CI: {test,bench}: stop creating & using *-bench-* storage

As we see - `bench` stored the:

```
        path: |
          ~/.cabal/packages
          ~/.cabal/store
```

Which means it stored just dependencies again, but now with `bench` deps aslo.
That duplication alse depleated the cache pool quick & created a complexity in
the cache key hitting for restoration.

`cache-deps` now going to already build deps for tests & bench.

Author: Anton-Latukha

.github/workflows/bench.yml

@@ -50,10 +50,9 @@ jobs:
         path: |
           ~/.cabal/packages
           ~/.cabal/store
-        key: v2-${{ runner.os }}-${{ matrix.ghc }}-bench-${{ hashFiles('cabal.project') }}
         restore-keys: |
             v2-${{ runner.os }}-${{ matrix.ghc }}-build-${{ hashFiles('cabal.project') }}
-            v2-${{ runner.os }}-${{ matrix.ghc }}-bench-
+            v2-${{ runner.os }}-${{ matrix.ghc }}-build-
             v2-${{ runner.os }}-${{ matrix.ghc }}
 
     - run: cabal update

.github/workflows/cache-deps.yml

@@ -118,4 +118,4 @@ jobs:
 
       # repeating builds to workaround segfaults in windows and ghc-8.8.4
       - name: Build
-        run: cabal build --only-dependencies || cabal build --only-dependencies || cabal build --only-dependencies
+        run: cabal v2-build --enable-tests --enable-benchmarks --only-dependencies || cabal v2-build --enable-tests --enable-benchmarks --only-dependencies || cabal v2-build --enable-tests --enable-benchmarks --only-dependencies

.github/workflows/test.yml

@@ -124,7 +124,6 @@ jobs:
             ${{ env.CABAL_STORE_DIR }}
           key: v2-${{ runner.os }}-${{ matrix.ghc }}-build-${{ hashFiles('cabal.project') }}
           restore-keys: |
-            v2-${{ runner.os }}-${{ matrix.ghc }}-bench-${{ hashFiles('cabal.project') }}
             v2-${{ runner.os }}-${{ matrix.ghc }}-build-
             v2-${{ runner.os }}-${{ matrix.ghc }}