Add `LLVM.init_native_target` and `LLVM.init_all_targets` #13530

Job	Run time
check_format	1m 36s
x86_64-gnu-test-preview_mt	5m 49s
x86_64-gnu-test	34m 15s
x86_64-gnu-test (FLAGS=-Dwithout_ffi USE_PCRE1=true, 1.0.0)	36m 19s
x86_64-musl-test	38m 6s
	1h 56m 5s

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