Upgrade to xunit3 #2297

Job	Run time
validate_readme	36s
create_nuget	4m 13s
validate_test_projects	1m 32s
build_and_test_x64 (windows-2022, Debug)	5m 29s
build_and_test_x64 (windows-2022, Debug, /p:InvariantGlobalization=true)	4m 53s
build_and_test_windows_x86 (Debug)	5m 32s
test_trimming (win-x64)	53s
build_and_test_x64 (windows-2022, Release)	5m 1s
test_trimming_wpf (win-x64)	2m 2s
build_and_test_windows_x86 (Debug, /p:InvariantGlobalization=true)	5m 31s
test_trimming (win-x86)	52s
build_and_test_x64 (windows-2022, Release, /p:InvariantGlobalization=true)	5m 31s
test_trimming_wpf (win-x86)	58s
build_and_test_windows_x86 (Release)	5m 30s
test_trimming (linux-x64)	49s
build_and_test_x64 (ubuntu-22.04, Debug)	4m 5s
build_and_test_windows_x86 (Release, /p:InvariantGlobalization=true)	5m 28s
test_trimming (osx-x64)	49s
build_and_test_x64 (ubuntu-22.04, Debug, /p:InvariantGlobalization=true)	3m 53s
build_and_test_x64 (ubuntu-22.04, Release)	3m 47s
build_and_test_x64 (ubuntu-22.04, Release, /p:InvariantGlobalization=true)	3m 59s
build_and_test_x64 (macos-14, Debug)	3m 15s
build_and_test_x64 (macos-14, Debug, /p:InvariantGlobalization=true)	3m 22s
build_and_test_x64 (macos-14, Release)	3m 8s
build_and_test_x64 (macos-14, Release, /p:InvariantGlobalization=true)	3m 29s
validate_nuget	1m 24s
merge_coverage	1s
deploy	1s
	1h 26m 3s

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