Prepare dotnet-svcutil.Xmlserializer tool build (#5334)

* Move dotnet-svcutil.xmlserlializer.sln to repository root to enable build by default.

* dotnet-svcutil.xmlserializer: bump up package patch version

* Add resources xlf files.

Author: imcarolwang

src/svcutilcore/dotnet-svcutil.xmlserializer.sln renamed to dotnet-svcutil.xmlserializer.sln

@@ -3,9 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.7.34202.233
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "dotnet-svcutil.xmlserializer", "src\dotnet-svcutil.xmlserializer.csproj", "{EAB2959D-0A16-4F60-A453-765491E1C069}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "dotnet-svcutil.xmlserializer", "src\svcutilcore\src\dotnet-svcutil.xmlserializer.csproj", "{EAB2959D-0A16-4F60-A453-765491E1C069}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "dotnet-svcutil.xmlserializer.IntegrationTests", "tests\dotnet-svcutil.xmlserializer.IntegrationTests.csproj", "{338BC15B-CE44-47D7-8F0B-1479677D569C}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "dotnet-svcutil.xmlserializer.IntegrationTests", "src\svcutilcore\tests\dotnet-svcutil.xmlserializer.IntegrationTests.csproj", "{338BC15B-CE44-47D7-8F0B-1479677D569C}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution