revert integration shards and just shard unit tests for now

.github/workflows/test.yml

@@ -95,7 +95,6 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         node-version: [10.x, 20.x]
         part: [a, b]
-        shards: [1, 2, 3, 4, 5, 6, 7, 8]
         include:
           - os: ubuntu-latest
             node-version: 18.x
@@ -144,11 +143,7 @@ jobs:
           path: .jest-cache
           key: jest-integration-${{ env.GITHUB_SHA }}
           restore-keys: jest-integration-
-      # Jest sharding for modern node versions
-      - run: yarn cover:integration --ci --shard ${{ matrix.shards }}/8 --cacheDirectory .jest-cache
-      # Sharding using parts for legacy node versions
       - run: yarn cover:integration:${{ matrix.part }} --ci --cacheDirectory .jest-cache || yarn cover:integration:${{ matrix.part }} --ci --cacheDirectory .jest-cache -f
-        if: matrix.node-version != '10.x' && matrix.node-version != '12.x' && matrix.node-version != '14.x'
       - run: yarn cover:merge
       - uses: codecov/codecov-action@v3
         with: