Add LLVM-based coverage generation support #3784

Job	Run time
pre-commit / pre-commit	1m 10s
ubuntu / gcc-build (ubuntu-24.04, Debug)	48s
ubuntu / clang-build-codecov	1m 37s
ubuntu / gcc-build (ubuntu-24.04, Release)	49s
ubuntu / gcc-build (ubuntu-24.04-arm, Debug)	1m 3s
mac / clang-build (Release)	2m 14s
mac / clang-build (Debug)	2m 8s
ubuntu / clang-build (ubuntu-24.04)	1m 35s
ubuntu / gcc-build (ubuntu-24.04-arm, Release)	54s
windows / msvc-build (Release)	1m 47s
ubuntu / clang-build (ubuntu-24.04-arm)	1m 53s
windows / clang-build	2m 1s
windows / msvc-build (Debug)	3m 9s
ubuntu / gcc-test (ubuntu-24.04-arm)	8m 33s
ubuntu / gcc-test (ubuntu-24.04)	8m 25s
ubuntu / clang-test (ubuntu-24.04)	8m 27s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	51s
ubuntu / clang-test (ubuntu-24.04-arm)	8m 15s
windows / clang-test	3m 10s
mac / clang-test	4m 52s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	2m 51s
windows / msvc-test	5m 35s
windows / clang-test-extended	4m 1s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	2m 22s
mac / clang-test-extended	3m 3s
windows / msvc-test-extended	3m 5s
ubuntu / gcc-test-extended (ubuntu-24.04)	4m 42s
ubuntu / gcc-test-extended (ubuntu-24.04-arm)	4m 40s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 27s
ubuntu / clang-test-extended (ubuntu-24.04-arm)	4m 33s
perf / ubuntu-gcc-build-perf-stats	1m 32s
perf / macos-clang-build-perf-stats	1m 43s
pages / build-scoreboard	13s
pages / build-doxygen-xml	2m 36s
pages / build-sphinx	2m 25s
pages / deploy-pages	0s
	1h 51m 29s

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