make frame omni bencher to install from path (#5853)

- install frame-omni-bencher from the path
- fix bench_features config

.github/workflows/cmd.yml

@@ -336,7 +336,9 @@ jobs:
 
       - name: Install dependencies for bench
         if: startsWith(steps.get-pr-comment.outputs.group2, 'bench')
-        run: cargo install subweight frame-omni-bencher --locked
+        run: |
+          cargo install subweight --locked
+          cargo install --path substrate/utils/frame/omni-bencher --locked
 
       - name: Run cmd
         id: cmd

.github/workflows/runtimes-matrix.json

@@ -44,6 +44,7 @@
     "package": "asset-hub-rococo-runtime",
     "path": "cumulus/parachains/runtimes/assets/asset-hub-rococo",
     "header": "cumulus/file_header.txt",
+    "bench_features": "runtime-benchmarks",
     "template": "cumulus/templates/xcm-bench-template.hbs",
     "uri": "wss://rococo-asset-hub-rpc.polkadot.io:443",
     "is_relay": false