[ci] Remove build_devtools_and_process_artifacts as a dependency to run_devtools_e2e_tests (#32267)

I just noticed that we don't actually need to let the devtools build
finish first because the e2e tests don't use those built files. We can
decouple them to allow them to run in paralllel.

.github/workflows/runtime_build_and_test.yml

@@ -533,11 +533,6 @@ jobs:
           RELEASE_CHANNEL: experimental
       - name: Display structure of build
         run: ls -R build
-      - name: Archive devtools build
-        uses: actions/upload-artifact@v4
-        with:
-          name: react-devtools-${{ matrix.browser }}
-          path: build/devtools.tgz
       # Simplifies getting the extension for local testing
       - name: Archive ${{ matrix.browser }} extension
         uses: actions/upload-artifact@v4
@@ -545,9 +540,20 @@ jobs:
           name: react-devtools-${{ matrix.browser }}-extension
           path: build/devtools/${{ matrix.browser }}-extension.zip
 
+  merge_devtools_artifacts:
+    name: Merge DevTools artifacts
+    needs: build_devtools_and_process_artifacts
+    runs-on: ubuntu-latest
+    steps:
+      - name: Merge artifacts
+        uses: actions/upload-artifact/merge@v4
+        with:
+          name: react-devtools
+          pattern: react-devtools-*-extension
+
   run_devtools_e2e_tests:
     name: Run DevTools e2e tests
-    needs: build_devtools_and_process_artifacts
+    needs: build_and_lint
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4