Add suppression if nowarn differs #205

Job	Run time
scala-library-nonbootstrapped	1m 2s
scala3-library-nonbootstrapped	1m 8s
scala3-library-bootstrapped	4m 2s
scala3-staging	6m 6s
scala3-tasty-inspector	6m 10s
scala3-sbt-bridge-bootstrapped	5m 26s
scala3-compiler-nonbootstrapped	3m 15s
test-scala3-sbt-bridge-nonbootstrapped	3m 24s
scala3-compiler-bootstrapped	5m 39s
test-scala3-sbt-bridge-bootstrapped	5m 28s
test-tasty-core-nonbootstrapped	1m 8s
test-tasty-core-bootstrapped	3m 50s
tasty-core-nonbootstrapped	1m 8s
scala3-sbt-bridge-nonbootstrapped	3m 5s
tasty-core-bootstrapped	4m 2s
scala-library-bootstrapped	4m 9s
	59m 2s

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