[CI] Switch to clang-format-20 (#419) #2582

Job	Run time
python-lint	4s
clang-format	11s
ubuntu-clang-build (ubuntu-24.04)	1m 19s
ubuntu-gcc-build (ubuntu-24.04)	1m 0s
ubuntu-clang-build (ubuntu-24.04-arm)	2m 20s
macos-clang-build	2m 39s
windows-clang-build	4m 20s
windows-msvc-build	2m 45s
ubuntu-gcc-build (ubuntu-24.04-arm)	1m 34s
windows-msvc-test	2m 19s
macos-clang-test	2m 55s
windows-clang-test	1m 24s
ubuntu-clang-sanitizer-build (ubuntu-24.04)	1m 1s
ubuntu-clang-test (ubuntu-24.04-arm)	6m 2s
ubuntu-clang-test (ubuntu-24.04)	4m 33s
ubuntu-gcc-test (ubuntu-24.04)	4m 27s
ubuntu-gcc-test (ubuntu-24.04-arm)	5m 38s
macos-clang-test-extended	2m 4s
windows-msvc-test-extended	1m 23s
windows-clang-test-extended	1m 17s
ubuntu-clang-sanitizer-test (ubuntu-24.04)	1m 53s
ubuntu-clang-test-extended (ubuntu-24.04)	2m 58s
ubuntu-clang-test-extended (ubuntu-24.04-arm)	3m 52s
ubuntu-gcc-test-extended (ubuntu-24.04-arm)	3m 55s
ubuntu-gcc-test-extended (ubuntu-24.04)	2m 27s
ubuntu-clang-sanitizer-test-extended (ubuntu-24.04)	2m 38s
ubuntu-gcc-build-codecov	3m 29s
ubuntu-gcc-build-perf-stats	1m 10s
	1h 11m 37s

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