Migrate haskell-src-meta/inspection-testing/shakespeare patches, drop old patches

The patches for haskell-src-meta, inspection-testing, and shakespeare need to be migrated to the latest Hackage releases.

The patches for happy, haskell-src-exts, kind-generics, kind-generics-th, and xml-hamlet all have newer versions on Hackage that build with GHC 8.8 and HEAD, so drop them.