Refactor paths and runtime names (#507)

chore: refactor for consistant naming of the crates and paths of the runtimes

* tests: ignore folder created by the tests
* chore: refactoring
* Update polkadot-parachains/Cargo.toml

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

cumulus/.github/workflows/srtool.yml

@@ -29,7 +29,7 @@ jobs:
         uses: chevdor/srtool-actions@v0.1.0
         with:
           chain: ${{ matrix.chain }}
-          runtime_dir: polkadot-parachains/${{ matrix.chain }}-runtime
+          runtime_dir: polkadot-parachains/${{ matrix.chain }}
       - name: Summary
         run: |
           echo '${{ steps.srtool_build.outputs.json }}' | jq > ${{ matrix.chain }}-srtool-digest.json