.Net: Remove Kusto and DuckDB (#12221)

### Motivation and Context

#8540

### Description

- Removing Kusto and DuckDB from the codebase

### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [ ] The code builds clean without any errors or warnings
- [ ] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [ ] All unit tests pass, and I have added new tests where possible
- [ ] I didn't break anyone 😄

Author: westey-m

dotnet/SK-dotnet.sln

@@ -86,8 +86,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "InternalUtilities", "Intern
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Connectors.Memory.Weaviate", "src\Connectors\Connectors.Memory.Weaviate\Connectors.Memory.Weaviate.csproj", "{6AAB0620-33A1-4A98-A63B-6560B9BA47A4}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Connectors.Memory.DuckDB", "src\Connectors\Connectors.Memory.DuckDB\Connectors.Memory.DuckDB.csproj", "{50FAE231-6F24-4779-9D02-12ABBC9A49E2}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "test", "test", "{5C246969-D794-4EC3-8E8F-F90D4D166420}"
 	ProjectSection(SolutionItems) = preProject
 		src\InternalUtilities\test\AssertExtensions.cs = src\InternalUtilities\test\AssertExtensions.cs
@@ -159,8 +157,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Model", "Model", "{1DBA09D6
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Plugins.Core", "src\Plugins\Plugins.Core\Plugins.Core.csproj", "{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Connectors.Memory.Kusto", "src\Connectors\Connectors.Memory.Kusto\Connectors.Memory.Kusto.csproj", "{E07608CC-D710-4655-BB9E-D22CF3CDD193}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "plugins", "plugins", "{D6D598DF-C17C-46F4-B2B9-CDE82E2DE132}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Plugins.UnitTests", "src\Plugins\Plugins.UnitTests\Plugins.UnitTests.csproj", "{5CB78CE4-895B-4A14-98AA-716A37DEEBB1}"
@@ -703,24 +699,12 @@ Global
 		{6AAB0620-33A1-4A98-A63B-6560B9BA47A4}.Publish|Any CPU.Build.0 = Publish|Any CPU
 		{6AAB0620-33A1-4A98-A63B-6560B9BA47A4}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{6AAB0620-33A1-4A98-A63B-6560B9BA47A4}.Release|Any CPU.Build.0 = Release|Any CPU
-		{50FAE231-6F24-4779-9D02-12ABBC9A49E2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{50FAE231-6F24-4779-9D02-12ABBC9A49E2}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{50FAE231-6F24-4779-9D02-12ABBC9A49E2}.Publish|Any CPU.ActiveCfg = Publish|Any CPU
-		{50FAE231-6F24-4779-9D02-12ABBC9A49E2}.Publish|Any CPU.Build.0 = Publish|Any CPU
-		{50FAE231-6F24-4779-9D02-12ABBC9A49E2}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{50FAE231-6F24-4779-9D02-12ABBC9A49E2}.Release|Any CPU.Build.0 = Release|Any CPU
 		{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1}.Publish|Any CPU.ActiveCfg = Publish|Any CPU
 		{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1}.Publish|Any CPU.Build.0 = Publish|Any CPU
 		{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1}.Release|Any CPU.Build.0 = Release|Any CPU
-		{E07608CC-D710-4655-BB9E-D22CF3CDD193}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{E07608CC-D710-4655-BB9E-D22CF3CDD193}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{E07608CC-D710-4655-BB9E-D22CF3CDD193}.Publish|Any CPU.ActiveCfg = Publish|Any CPU
-		{E07608CC-D710-4655-BB9E-D22CF3CDD193}.Publish|Any CPU.Build.0 = Publish|Any CPU
-		{E07608CC-D710-4655-BB9E-D22CF3CDD193}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{E07608CC-D710-4655-BB9E-D22CF3CDD193}.Release|Any CPU.Build.0 = Release|Any CPU
 		{5CB78CE4-895B-4A14-98AA-716A37DEEBB1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{5CB78CE4-895B-4A14-98AA-716A37DEEBB1}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{5CB78CE4-895B-4A14-98AA-716A37DEEBB1}.Publish|Any CPU.ActiveCfg = Debug|Any CPU
@@ -1559,7 +1543,6 @@ Global
 		{FBEB24A0-E4E9-44D7-B56C-48D91D39A3F9} = {1B4CBDE0-10C2-4E7D-9CD0-FE7586C96ED1}
 		{4D3DAE63-41C6-4E1C-A35A-E77BDFC40675} = {831DDCA2-7D2C-4C31-80DB-6BDB3E1F7AE0}
 		{6AAB0620-33A1-4A98-A63B-6560B9BA47A4} = {24503383-A8C4-4255-9998-28D70FE8E99A}
-		{50FAE231-6F24-4779-9D02-12ABBC9A49E2} = {24503383-A8C4-4255-9998-28D70FE8E99A}
 		{5C246969-D794-4EC3-8E8F-F90D4D166420} = {4D3DAE63-41C6-4E1C-A35A-E77BDFC40675}
 		{314A2705-0F70-44B6-8988-C6DF77BDFD42} = {4D3DAE63-41C6-4E1C-A35A-E77BDFC40675}
 		{C7299F56-3A55-471E-B10E-B1FBE101C625} = {314A2705-0F70-44B6-8988-C6DF77BDFD42}
@@ -1571,7 +1554,6 @@ Global
 		{E85EA4D0-BB7E-4DFD-882F-A76EB8C0B8FF} = {958AD708-F048-4FAF-94ED-D2F2B92748B9}
 		{1DBA09D6-0506-4AFA-9DF0-0A0E8D6586B1} = {958AD708-F048-4FAF-94ED-D2F2B92748B9}
 		{0D0C4DAD-E6BC-4504-AE3A-EEA4E35920C1} = {D6D598DF-C17C-46F4-B2B9-CDE82E2DE132}
-		{E07608CC-D710-4655-BB9E-D22CF3CDD193} = {24503383-A8C4-4255-9998-28D70FE8E99A}
 		{D6D598DF-C17C-46F4-B2B9-CDE82E2DE132} = {831DDCA2-7D2C-4C31-80DB-6BDB3E1F7AE0}
 		{5CB78CE4-895B-4A14-98AA-716A37DEEBB1} = {D6D598DF-C17C-46F4-B2B9-CDE82E2DE132}
 		{A21FAC7C-0C09-4EAD-843B-926ACEF73C80} = {831DDCA2-7D2C-4C31-80DB-6BDB3E1F7AE0}

dotnet/samples/Concepts/Concepts.csproj

@@ -69,9 +69,7 @@
     <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.AzureAISearch\Connectors.Memory.AzureAISearch.csproj" />
     <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.CosmosMongoDB\Connectors.Memory.CosmosMongoDB.csproj" />
     <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.Chroma\Connectors.Memory.Chroma.csproj" />
-    <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.DuckDB\Connectors.Memory.DuckDB.csproj" />
     <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.InMemory\Connectors.Memory.InMemory.csproj" />
-    <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.Kusto\Connectors.Memory.Kusto.csproj" />
     <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.MongoDB\Connectors.Memory.MongoDB.csproj" />
     <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.Pinecone\Connectors.Memory.Pinecone.csproj" />
     <ProjectReference Include="..\..\src\Connectors\Connectors.Memory.PgVector\Connectors.Memory.PgVector.csproj" />