[Automated] PRs inserted in VS build feature.debugger.stackAnalysis-11308.44

[dotnet-bot]

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• Centralize Visual Studio installation discovery and assembly resolution in test infrastructure
• Fix IL2091 trimming warning in FSharp.Core LazyExtensions.Create
• Auto-set FSharpCompilerPath when debugging VisualFSharpDebug VSIX
• Type relations cache: optimize key generation
• Skip tests using nuget from signed builds
• Upgrade Visual Studio and xcopy-msbuild version to 18.0
• Update the agent pool for the PR builds
• Bump versions for 18.3
• Work around for infinite restore in VS