AvoidInfix: refactor checkMatchingInfix #5689

Job	Run time
test-scala-native (windows-latest)	11m 12s
test (11, windows-latest)	10m 36s
formatting	20s
test-scala-native (ubuntu-latest)	6m 32s
community-test (11, windows-latest, Scala2)	15m 0s
test (11, ubuntu-latest)	8m 22s
test (21, windows-latest)	9m 41s
community-test (11, windows-latest, Scala3)	14m 41s
native-image (macOS-latest, default)	7m 34s
test (21, ubuntu-latest)	7m 21s
community-test (11, windows-latest, Spark)	24m 44s
native-image (ubuntu-latest, default)	4m 23s
community-test (11, windows-latest, Intellij)	18m 21s
native-image (ubuntu-latest, musl)	4m 42s
community-test (11, windows-latest, Other)	20m 48s
community-test (11, ubuntu-latest, Scala2)	13m 26s
community-test (11, ubuntu-latest, Scala3)	12m 40s
community-test (11, ubuntu-latest, Spark)	22m 5s
community-test (11, ubuntu-latest, Intellij)	16m 1s
community-test (11, ubuntu-latest, Other)	15m 54s
dockerize	0s
	4h 4m 23s

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