switch boost dependency in bzlmod to bcr (#2789) #1512

Job	Run time
clang-compile-with-bazel	9m 25s
clang-compile-with-cmake	2m 56s
clang-compile-with-bazel-all-options	11m 6s
clang-compile-with-boringssl	11m 28s
clang-compile-with-cmake-all-options	5m 24s
clang-compile-with-make	2m 53s
clang-compile-with-make-all-options	5m 22s
clang-unittest	15m 38s
gcc-compile-with-bazel	10m 40s
gcc-compile-with-bazel-all-options	12m 22s
gcc-compile-with-boringssl	11m 58s
gcc-compile-with-cmake	3m 42s
gcc-compile-with-cmake-all-options	5m 19s
gcc-compile-with-make	2m 55s
gcc-compile-with-make-all-options	4m 48s
	1h 55m 56s

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