Add Xcode installation step to macOS workflows (#476) #3006

Job	Run time
lint / clang-format	9s
lint / shell-lint	8s
lint / python-lint	6s
mac / macos-clang-build	8m 52s
mac / macos-clang-build-debug	5m 42s
ubuntu / ubuntu-gcc-build (ubuntu-24.04-arm)	3m 33s
ubuntu / ubuntu-gcc-build (ubuntu-24.04)	1m 30s
ubuntu / ubuntu-clang-build (ubuntu-24.04)	1m 10s
ubuntu / ubuntu-gcc-build-debug (ubuntu-24.04)	1m 5s
ubuntu / ubuntu-clang-build (ubuntu-24.04-arm)	2m 58s
windows / windows-clang-build	2m 50s
windows / windows-msvc-build	3m 32s
windows / windows-msvc-build-debug	6m 39s
windows / windows-clang-test	1m 51s
ubuntu / ubuntu-clang-sanitizer-build (ubuntu-24.04)	1m 36s
ubuntu / ubuntu-clang-test (ubuntu-24.04-arm)	6m 30s
ubuntu / ubuntu-clang-test (ubuntu-24.04)	4m 58s
ubuntu / ubuntu-gcc-test (ubuntu-24.04)	4m 33s
ubuntu / ubuntu-gcc-test (ubuntu-24.04-arm)	6m 0s
windows / windows-msvc-test	3m 29s
ubuntu / ubuntu-clang-sanitizer-test (ubuntu-24.04)	1m 53s
windows / windows-clang-test-extended	3m 9s
windows / windows-msvc-test-extended	3m 1s
ubuntu / ubuntu-clang-sanitizer-test-extended (ubuntu-24.04)	1m 48s
mac / macos-clang-test	3m 22s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04-arm)	4m 17s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04)	2m 58s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04)	2m 38s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04-arm)	4m 24s
mac / macos-clang-test-extended	2m 26s
ubuntu / ubuntu-gcc-build-codecov	3m 40s
perf / ubuntu-gcc-build-perf-stats	1m 28s
	1h 42m 15s

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