[philderbeast]

Fixes #12186 by avoiding the problem, giving HLS and hbd their own shared cabal.hie.project and each their own cradle. Stacked on #12416 (depends-on: #12416). Adds notes to the contributing guide on the use of HLS with the haskell/cabal project.

#12369 could remove the need for an hie.yaml cradle for HLS.

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• Patches conform to the coding conventions.
• Is this a PR that fixes CI? If so, it will need to be backported to older cabal release branches (ask maintainers for directions).