Upgrade to ghc 9.10

[jhrcek]

Trying to make things work with GHC 9.10, for the purpose of including stylish-haskell in haskell language server (haskell/haskell-language-server#4233)

[jhrcek]

Status update: this is functionally complete, but waiting for ghc 9.10 to become available in stackage snapshot so I can upgrade stack ci config

[jhrcek]

Hello @jaspervdj
could you please check this PR?
The only thing missing I think is updating stack CI config to use ghc 9.10 based resolver.
But in in stackage I see stylish-haskell has been disabled because it doesn't support ghc 9.10 (see commercialhaskell/stackage#7414), so it seems like a bit of a chicken-egg problem.
Would it make sense to you to 1) disable stack ci temporarily and then 2) release new version of stylish-haskell with 9.10 support to hackage so we could enable it with ghc 9.10 in hls?

[jaspervdj]

Thanks!

[jaspervdj]

I am addressing the broken CI here: #484

IMO we should not switch the stack CI over to use the newest GHC version (yet), as long as it's covered by cabal we're good. This avoids the chicken-and-egg problem.

[jhrcek]

Sounds great. Feel free to merge your PR and I'll rebase this PR on top, removing CI changes from this one.

[jhrcek]

FYI removing 9.4 from CI, because its associated base 4.17 is out of bounds for ghc-lib-parser, which requires base >= 4.18.

[michaelpj]

Can we make progress on this now?

[jhrcek]

@michaelpj The current state is that ~10/278 tests are still failing with ghc 9.10.
I remembered we were trying to fix them with Alan Z during zurihac but we gave up, because Alan realized something fundamental is missing in EP annotations within ghc said he'd try to get this fixed for the next 9.10 patch release.