parser: allow lock prefix instructions and numbered reg in asm inline #5259

Job	Run time
tests-sanitize-address-clang	1h 34m 51s
tests-sanitize-undefined-clang	49m 48s
tests-sanitize-undefined-gcc	1h 19m 40s
tests-sanitize-address-gcc	2h 11m 36s
tests-sanitize-address-msvc	57s
tests-sanitize-memory-clang	2h 45m 43s
	8h 42m 35s

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