Krzysztof Gogolewski authored Dec 18, 2023 and Krzysztof Gogolewski committed Jan 11, 2024

Also remove -Wnoncanonical-{monoid,monad}-instances from -Wcompat,
since they are enabled by default. Refresh wcompat-warnings/ test
with new -Wcompat warnings.

Part of #24267

Co-authored-by: sheaf <sam.derbyshire@gmail.com>