Upgrade to xunit3 #2298

Job	Run time
validate_test_projects	2m 6s
create_nuget	4m 35s
build_and_test_windows_x86 (Debug)	4m 44s
build_and_test_x64 (windows-2022, Debug)	4m 45s
validate_readme	34s
build_and_test_windows_x86 (Debug, /p:InvariantGlobalization=true)	4m 43s
build_and_test_x64 (windows-2022, Debug, /p:InvariantGlobalization=true)	4m 45s
build_and_test_windows_x86 (Release)	4m 47s
build_and_test_x64 (windows-2022, Release)	4m 46s
build_and_test_windows_x86 (Release, /p:InvariantGlobalization=true)	4m 47s
build_and_test_x64 (windows-2022, Release, /p:InvariantGlobalization=true)	4m 45s
test_trimming (win-x64)	52s
build_and_test_x64 (ubuntu-22.04, Debug)	4m 3s
test_trimming (win-x86)	53s
build_and_test_x64 (ubuntu-22.04, Debug, /p:InvariantGlobalization=true)	3m 55s
test_trimming (linux-x64)	54s
test_trimming_wpf (win-x64)	1m 47s
build_and_test_x64 (ubuntu-22.04, Release)	4m 19s
test_trimming (osx-x64)	53s
test_trimming_wpf (win-x86)	1m 50s
build_and_test_x64 (ubuntu-22.04, Release, /p:InvariantGlobalization=true)	3m 52s
build_and_test_x64 (macos-14, Debug)	3m 18s
build_and_test_x64 (macos-14, Debug, /p:InvariantGlobalization=true)	3m 11s
build_and_test_x64 (macos-14, Release)	3m 18s
build_and_test_x64 (macos-14, Release, /p:InvariantGlobalization=true)	3m 29s
validate_nuget	6s
merge_coverage	1s
deploy	1s
	1h 21m 59s

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