Add Xcode installation step to macOS workflows #3004

Job	Run time
lint / shell-lint	12s
lint / python-lint	6s
lint / clang-format	14s
ubuntu / ubuntu-gcc-build-debug (ubuntu-24.04)	1m 13s
ubuntu / ubuntu-clang-build (ubuntu-24.04-arm)	1m 50s
ubuntu / ubuntu-clang-build (ubuntu-24.04)	1m 20s
ubuntu / ubuntu-gcc-build (ubuntu-24.04)	1m 17s
ubuntu / ubuntu-gcc-build (ubuntu-24.04-arm)	1m 48s
windows / windows-msvc-build-debug	1m 39s
windows / windows-clang-build	1m 37s
windows / windows-msvc-build	1m 39s
mac / macos-clang-build	1m 46s
mac / macos-clang-build-debug	1m 35s
windows / windows-msvc-test	1s
windows / windows-msvc-test-extended	1s
windows / windows-clang-test	1s
windows / windows-clang-test-extended	1s
ubuntu / ubuntu-clang-test	1s
ubuntu / ubuntu-clang-sanitizer-build	1s
ubuntu / ubuntu-gcc-test	1s
ubuntu / ubuntu-clang-sanitizer-test	1s
ubuntu / ubuntu-clang-test-extended	1s
ubuntu / ubuntu-gcc-test-extended	1s
ubuntu / ubuntu-gcc-build-codecov	1s
ubuntu / ubuntu-clang-sanitizer-test-extended	1s
mac / macos-clang-test	1s
mac / macos-clang-test-extended	1s
perf	0s
	16m 30s

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