Restore uniqueness of GHA cache names per configuration

And make sure to hash all configuration files (like `*.cabal*` and
`cabal.project*`) correctly, and include those hahses in the GHA cache names
too.

Author: jorisdral

.github/workflows/haskell.yml

@@ -93,10 +93,10 @@ jobs:
         cache-name: cache-cabal-build-130824
       with:
         path: ${{ steps.setup-haskell.outputs.cabal-store }}
-        key: ${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-name }}-${{ hashFiles('**/*.cabal') }}-${{ hashFiles('**/cabal.project') }}-${{ hashFiles('**/cabal.project.debug') }}
+        key: ${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-name }}-${{ hashFiles('*.cabal') }}-${{ hashFiles('cabal.project*') }}-${{ matrix.cabal-project-file }}
         restore-keys: |
-          ${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-name }}-${{ hashFiles('**/*.cabal') }}-${{ hashFiles('**/cabal.project') }}-
-          ${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-name }}-${{ hashFiles('**/*.cabal') }}-
+          ${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-name }}-${{ hashFiles('*.cabal') }}-${{ hashFiles('cabal.project*') }}
+          ${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-name }}-${{ hashFiles('*.cabal') }}-
           ${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-name }}-
 
     - name: Install cabal dependencies