Update to xunit v3 #2319

Job	Run time
validate_test_projects	2m 21s
build_and_test_windows_x86 (Debug)	7m 10s
build_and_test_windows_x86 (Debug, /p:InvariantGlobalization=true)	7m 55s
build_and_test_x64 (windows-2022, Debug)	5m 1s
build_and_test_x64 (windows-2022, Debug, /p:InvariantGlobalization=true)	6m 38s
build_and_test_windows_x86 (Release)	7m 37s
build_and_test_x64 (windows-2022, Release)	5m 36s
build_and_test_windows_x86 (Release, /p:InvariantGlobalization=true)	6m 55s
build_and_test_x64 (windows-2022, Release, /p:InvariantGlobalization=true)	7m 11s
build_and_test_x64 (ubuntu-22.04, Debug)	10m 17s
create_nuget	4m 16s
test_trimming (win-x64)	50s
build_and_test_x64 (ubuntu-22.04, Debug, /p:InvariantGlobalization=true)	9m 51s
validate_readme	47s
test_trimming (win-x86)	58s
build_and_test_x64 (ubuntu-22.04, Release)	9m 50s
test_trimming (linux-x64)	50s
build_and_test_x64 (ubuntu-22.04, Release, /p:InvariantGlobalization=true)	10m 1s
test_trimming (osx-x64)	56s
build_and_test_x64 (macos-14, Debug)	6m 57s
test_trimming_wpf (win-x64)	1m 31s
build_and_test_x64 (macos-14, Debug, /p:InvariantGlobalization=true)	7m 3s
test_trimming_wpf (win-x86)	1m 22s
build_and_test_x64 (macos-14, Release)	6m 58s
build_and_test_x64 (macos-14, Release, /p:InvariantGlobalization=true)	6m 34s
validate_nuget	2m 25s
deploy	0s
merge_coverage	0s
	2h 17m 50s

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