[ci] Try to parallelize devtools builds

Building DevTools is currently the long pole for the runtime CI job. Let's see if we can get the overall runtime for runtime build and test down by speeding this one step up.

Author: poteto

.github/workflows/runtime_build_and_test.yml

@@ -501,6 +501,9 @@ jobs:
     name: Build DevTools and process artifacts
     needs: build_and_lint
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        browser: [chrome, firefox, edge]
     steps:
       - uses: actions/checkout@v4
         with:
@@ -525,7 +528,7 @@ jobs:
           pattern: _build_*
           path: build
           merge-multiple: true
-      - run: ./scripts/ci/pack_and_store_devtools_artifacts.sh
+      - run: ./scripts/ci/pack_and_store_devtools_artifacts.sh ${{ matrix.browser }}
         env:
           RELEASE_CHANNEL: experimental
       - name: Display structure of build

scripts/ci/pack_and_store_devtools_artifacts.sh

@@ -17,10 +17,14 @@ npm pack
 mv ./react-devtools-inline*.tgz ../../build/devtools/
 
 cd ../react-devtools-extensions
-yarn build
+if [ -n "$1" ]; then
+  yarn build:$1
+else
+  yarn build
+fi
 mv ./chrome/build/ReactDevTools.zip ../../build/devtools/chrome-extension.zip
 mv ./firefox/build/ReactDevTools.zip ../../build/devtools/firefox-extension.zip
 
 # Compress all DevTools artifacts into a single tarball for easy download
 cd ../../build/devtools
-tar -zcvf ../devtools.tgz .
+tar -zcvf ../devtools.tgz .