BREAKING(log): remove `NOTSET` `LogLevel` #15617

Job	Run time
test-node (latest, ubuntu-latest)	13s
test (v1.x, ubuntu-latest)	1m 3s
test (v1.x, windows-latest)	1m 22s
test (v1.x, macOS-latest)	59s
test (canary, ubuntu-latest)	1m 38s
test (canary, windows-latest)	1m 58s
test (canary, macOS-latest)	1m 26s
lint (ubuntu-latest)	27s
lint (windows-latest)	36s
publish-dry-run	13s
wasm (crypto/_wasm)	5s
	10m 0s

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