Updates L0 to store benchmark results in a post-merge pipeline

By performing the upload of benchmark results in a post-merge pipeline, we
can enable contributions from forks, which don't otherwise have permission
to push new benchmark results.

Author: pranavm-nvidia

.github/workflows/tripy-l0.yml

@@ -79,15 +79,21 @@ jobs:
         run: |
           pytest tests/performance -v -m "not l1" --benchmark-warmup=on --benchmark-json benchmark.json
 
-    - name: Store benchmark result
+    - name: Check benchmark result
       uses: benchmark-action/github-action-benchmark@v1
       with:
         tool: 'pytest'
         output-file-path: ${{ github.workspace }}/tripy/benchmark.json
         github-token: ${{ secrets.GITHUB_TOKEN }}
-        auto-push: true
+        auto-push: false
         # Show alert with commit comment on detecting possible performance regression
         alert-threshold: '105%'
         comment-on-alert: true
         fail-on-alert: true
         gh-pages-branch: benchmarks
+
+    - name: Upload benchmark result
+      uses: actions/upload-artifact@v4
+      with:
+        name: benchmark-results
+        path: ${{ github.workspace }}/tripy/benchmark.json

.github/workflows/tripy-update-benchmark.yml

@@ -0,0 +1,27 @@
+name: Post-merge benchmark update
+
+on:
+  push:
+    branches: [ "main" ]
+
+permissions:
+  contents: write
+
+jobs:
+  upload-benchmarks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Retrieve benchmark results
+        uses: actions/download-artifact@v4
+        with:
+          name: benchmark-results
+          path: ${{ github.workspace }}/benchmark.json
+
+      - name: Store benchmark result
+        uses: benchmark-action/github-action-benchmark@v1
+        with:
+          tool: 'pytest'
+          output-file-path: ${{ github.workspace }}/benchmark.json
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          auto-push: false
+          gh-pages-branch: benchmarks