Increment AnalysisLevel properties for .NET 11 SDK (#52468)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: baronfel <573979+baronfel@users.noreply.github.com>
Co-authored-by: Chet Husk <baronfel@users.noreply.github.com>
Co-authored-by: Alexander Köplinger <alex.koeplinger@outlook.com>

Author: 3 people

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets

@@ -22,8 +22,8 @@ Copyright (c) .NET Foundation. All rights reserved.
 
     <_NoneAnalysisLevel>4.0</_NoneAnalysisLevel>
     <!-- When the base TFM of the platform bumps, these must be bumped as well. Preview should always be the 'next' TFM. -->
-    <_LatestAnalysisLevel>10.0</_LatestAnalysisLevel>
-    <_PreviewAnalysisLevel>11.0</_PreviewAnalysisLevel>
+    <_LatestAnalysisLevel>11.0</_LatestAnalysisLevel>
+    <_PreviewAnalysisLevel>12.0</_PreviewAnalysisLevel>
 
     <AnalysisLevel Condition="'$(AnalysisLevel)' == '' And
                               '$(TargetFrameworkIdentifier)' == '.NETCoreApp' And

test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs

@@ -159,6 +159,9 @@ static void Main()
         }
 
         [InlineData(ToolsetInfo.CurrentTargetFramework)]
+        // Fixing this test requires bumping _LatestAnalysisLevel and _PreviewAnalysisLevel
+        // Bumping will cause It_maps_analysis_properties_to_globalconfig to fail which requires changes in dotnet/roslyn-analyzers repo.
+        // See instructions in the comment in It_maps_analysis_properties_to_globalconfig
         [RequiresMSBuildVersionTheory("16.8")]
         public void It_defaults_preview_AnalysisLevel_to_the_next_tfm(string currentTFM)
         {
@@ -370,6 +373,10 @@ static void Main()
         [InlineData("10.0", "", "true", "")]
         [InlineData("10", "default", "false", "Security")]
         [InlineData("10.0", "", "true", "Usage")]
+        [InlineData("11", "default", "false", "")]
+        [InlineData("11.0", "", "true", "")]
+        [InlineData("11", "default", "false", "Security")]
+        [InlineData("11.0", "", "true", "Usage")]
         [RequiresMSBuildVersionTheory("16.8")]
         public void It_maps_analysis_properties_to_globalconfig(string analysisLevel, string analysisMode, string codeAnalysisTreatWarningsAsErrors, string category)
         {