Add CMake include_guard() directives to each *.cmake file #4315

Job	Run time
pre-commit / pre-commit	1m 14s
mac / clang-build (Debug)	2m 10s
mac / clang-build (Release)	1m 55s
ubuntu / clang-build (ubuntu-24.04)	2m 42s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 30s
ubuntu / gcc-build (ubuntu-24.04, Release)	2m 15s
ubuntu / gcc-build (ubuntu-24.04-arm, Release)	2m 1s
ubuntu / gcc-build (ubuntu-24.04-arm, Debug)	1m 47s
ubuntu / clang-build (ubuntu-24.04-arm)	1m 51s
windows / clang-build	3m 34s
windows / msvc-build (Debug)	3m 27s
windows / msvc-build (Release)	3m 20s
mac / clang-test	4m 45s
windows / clang-test	2m 50s
mac / clang-test-extended	2m 58s
windows / clang-test-extended	3m 1s
windows / msvc-test	4m 33s
ubuntu / gcc-test (ubuntu-24.04-arm)	8m 23s
ubuntu / gcc-test (ubuntu-24.04)	8m 23s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	3m 32s
ubuntu / clang-test (ubuntu-24.04-arm)	8m 21s
ubuntu / clang-test (ubuntu-24.04)	8m 23s
windows / msvc-test-extended	2m 45s
ubuntu / gcc-test-extended (ubuntu-24.04)	4m 35s
ubuntu / gcc-test-extended (ubuntu-24.04-arm)	4m 27s
ubuntu / clang-test-extended (ubuntu-24.04-arm)	4m 32s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 49s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	2m 50s
ubuntu / gcc-build-codecov	7m 29s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	2m 27s
perf / macos-clang-build-perf-stats	1m 31s
perf / ubuntu-gcc-build-perf-stats	1m 17s
pages / build-scoreboard	16s
pages / build-doxygen-xml	21s
pages / build-sphinx	46s
pages / deploy-pages	0s
	2h 2m 0s

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