fix isClassNodeIdentifier in hls-class-plugin#4020

soulomoon merged 10 commits intomasterhaskell/haskell-language-server:masterfrom

3942-deriveanyclass-causes-internal-error-inittcwithgbl-failedhaskell/haskell-language-server:3942-deriveanyclass-causes-internal-error-inittcwithgbl-failedCopy head branch name to clipboard