Add a BenchmarkDotNet project

[JeremyKuhne]

This is to faciliate writing and running micro benchmarks.

Have to workaround a few issues to make this work:

1. Can't output to artifacts/bin as it contains a global.json (which breaks project finding logic and other things)
2. Need to be able to skip _CustomizeXlfSourceNames

Other things:

• Bump the BenchmarkDotNet version
• Add the Windows package versions to make it easy to use that functionality when needed

[Copilot]

Pull request overview

This PR adds infrastructure for writing and running micro-benchmarks using BenchmarkDotNet 0.15.6. The implementation includes a new Benchmark project in the test directory with workarounds for BenchmarkDotNet's project discovery limitations related to global.json files in the artifacts/bin directory.

• Adds new test/Benchmark project configured as an executable with BenchmarkDotNet integration
• Updates build infrastructure to support conditional XLF customization and test usings
• Bumps BenchmarkDotNet package version and adds Windows diagnostics package support

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/Benchmark/Program.cs	Entry point for running benchmarks with extensive documentation of BenchmarkDotNet integration workarounds
test/Benchmark/InfoTests.cs	Sample benchmark demonstrating how to benchmark the dotnet --info command
test/Benchmark/Benchmark.csproj	Project configuration setting up executable project with BenchmarkDotNet, excluding test infrastructure
test/Benchmark/Directory.Build.props	Custom build settings redirecting output to artifacts/Benchmark and disabling XLF customization
test/Directory.Build.props	Makes test global usings conditional via IncludeTestUsings property
build/GenerateResxSource.targets	Adds support for skipping XLF source name customization via SkipCustomizeXlfSourceNames property
eng/Versions.props	Bumps BenchmarkDotNet to 0.15.6 and adds BenchmarkDotNet.Diagnostics.Windows at 0.14.0
Directory.Packages.props	Adds BenchmarkDotNet package versions maintaining alphabetical ordering
sdk.slnx	Includes new Benchmark project in solution