generalize findConflictedAlias a bit #8849

Job	Run time
ormolu	5s
build ucm (ubuntu-20.04)	8m 42s
build ucm (macOS-12)	11m 25s
build ucm (windows-2019)	15m 25s
generate jit source	6s
run interpreter tests (ubuntu-20.04)	1m 7s
run interpreter tests (macOS-12)	1m 53s
run transcripts (ubuntu-20.04)	3m 44s
run transcripts (macOS-12)	6m 12s
run transcripts (windows-2019)	7m 43s
build jit binary / build jit binary (ubuntu-20.04)	16s
build jit binary / build jit binary (macOS-12)	17s
build jit binary / build jit binary (windows-2019)	21s
test jit / test jit (ubuntu-20.04)	11s
test jit / test jit (macOS-12)	14s
	57m 41s

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