Add Xcode installation step to macOS workflows #3005

Job	Run time
lint / python-lint	7s
lint / shell-lint	12s
lint / clang-format	15s
ubuntu / ubuntu-gcc-build-debug (ubuntu-24.04)	1m 2s
ubuntu / ubuntu-gcc-build (ubuntu-24.04-arm)	3m 12s
ubuntu / ubuntu-gcc-build (ubuntu-24.04)	1m 17s
mac / macos-clang-build	4m 45s
ubuntu / ubuntu-clang-build (ubuntu-24.04)	1m 8s
ubuntu / ubuntu-clang-build (ubuntu-24.04-arm)	2m 47s
windows / windows-msvc-build	8m 10s
mac / macos-clang-build-debug	5m 3s
windows / windows-msvc-build-debug	7m 3s
windows / windows-clang-build	2m 48s
ubuntu / ubuntu-clang-sanitizer-build (ubuntu-24.04)	1m 17s
ubuntu / ubuntu-clang-test (ubuntu-24.04)	5m 0s
ubuntu / ubuntu-clang-test (ubuntu-24.04-arm)	5m 20s
windows / windows-clang-test	2m 2s
ubuntu / ubuntu-gcc-test (ubuntu-24.04-arm)	6m 30s
ubuntu / ubuntu-gcc-test (ubuntu-24.04)	4m 45s
mac / macos-clang-test	2m 54s
ubuntu / ubuntu-clang-sanitizer-test (ubuntu-24.04)	2m 26s
windows / windows-clang-test-extended	1m 53s
ubuntu / ubuntu-clang-sanitizer-test-extended (ubuntu-24.04)	2m 33s
mac / macos-clang-test-extended	2m 2s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04)	3m 3s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04-arm)	5m 6s
windows / windows-msvc-test	2m 55s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04-arm)	4m 38s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04)	3m 13s
windows / windows-msvc-test-extended	2m 4s
ubuntu / ubuntu-gcc-build-codecov	3m 35s
perf / ubuntu-gcc-build-perf-stats	1m 32s
	1h 40m 37s

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