refactor(yaml): simplify and rename `dropEndingNewline()` #13102

Job	Run time
test-node (latest, ubuntu-latest)	14s
lint (ubuntu-latest)	31s
test (v1.x, ubuntu-latest)	1m 4s
lint (windows-latest)	1m 9s
publish-dry-run	16s
test (v1.x, windows-latest)	1m 26s
test (v1.x, macOS-latest)	1m 4s
wasm (crypto/_wasm)	6s
	5m 50s

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