tests: add a test for short enum syntax across modules (related #1218… #6872

Job	Run time
tests-sanitize-address-clang	2h 1m 53s
tests-sanitize-address-gcc	2h 27m 48s
tests-sanitize-address-msvc	3m 49s
tests-sanitize-memory-clang	3h 9m 49s
tests-sanitize-undefined-clang	57m 19s
tests-sanitize-undefined-gcc	1h 30m 1s
	10h 10m 39s

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