Prepare for GHC 9.8 / Cabal 3.11

[andreasabel]

Prepare for GHC 9.8. Commits:

• haiku: add as known platform
• Bump aeson to ^>= 2.2.0.0, use attoparsec-aeson
• Bumps, to allow building with GHC 9.8.1-alpha1
• CI: bump haskell-ci.yml to GHCs 9.6.2 9.4.5 9.2.8
• CI: bump cabal.yml to GHC 9.6.2 and cabal 3.10.1.0

Subsumes:

• haiku: add as known platform #1217
• Recognise OtherOS "haiku" as a valid identifier. #1221

Tested on GHC 9.8.1-alpha1 locally. Needed these settings in a cabal.project.local:

write-ghc-environment-files: always

constraints: Cabal-syntax >= 3.11
constraints: Cabal >= 3.11
constraints: th-abstraction >= 0.6
constraints: aeson >= 2.2.0.0

allow-newer: *:base
allow-newer: *:template-haskell
allow-newer: *:ghc-prim
allow-newer: *:Cabal-syntax
allow-newer: *:Cabal
allow-newer: *:deepseq
allow-newer: *:th-abstraction

constraints: array            installed
constraints: base             installed
constraints: binary           installed
constraints: bytestring       installed
constraints: containers       installed
constraints: deepseq          installed
constraints: directory        installed
constraints: filepath         installed
constraints: ghc              installed
constraints: ghc-boot         installed
constraints: ghc-boot-th      installed
constraints: ghc-heap         installed
constraints: ghc-prim         installed
constraints: ghci             installed
constraints: hpc              installed
constraints: integer-gmp      installed
constraints: mtl              installed
constraints: pretty           installed
constraints: process          installed
constraints: rts              installed
constraints: stm              installed
constraints: template-haskell installed
constraints: terminfo         installed
constraints: time             installed
constraints: transformers     installed
constraints: unix             installed
constraints: xhtml            installed

source-repository-package
  type:     git
  location: https://github.com/TeofilC/aeson
  tag:      d79464b0e1b3f1796325528ec253bb05685acf5c

source-repository-package
  type:     git
  location: https://github.com/TeofilC/aeson
  tag:      d79464b0e1b3f1796325528ec253bb05685acf5c
  subdir:   attoparsec-aeson

source-repository-package
  type:     git
  location: https://github.com/acid-state/acid-state
  tag:      479e3be5258e310b93d19d92fcd0c74f19c08623