Require grpc extension in grpc workflow

Author: jeromegamez

.github/workflows/grpc-tests.yml

@@ -38,8 +38,6 @@ jobs:
     if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
 
     env:
-      php-version: '8.5'
-      extensions: grpc
       key: cache-grpc
 
     steps:
@@ -52,8 +50,8 @@ jobs:
         id: extcache
         uses: shivammathur/cache-extensions@v1
         with:
-          php-version: ${{ env.php-version }}
-          extensions: ${{ env.extensions }}
+          php-version: 8.5
+          extensions: grpc
           key: ${{ env.key }}
 
       - name: Cache extensions
@@ -75,17 +73,6 @@ jobs:
       - name: Setup problem matchers for PHP
         run: echo "::add-matcher::${{ runner.tool_cache }}/php.json"
 
-      - name: Detect gRPC extension
-        id: grpc
-        run: |
-          if php -m | grep -qi '^grpc$'; then
-            echo "grpc_present=true" >> "$GITHUB_OUTPUT"
-          else
-            echo "grpc_present=false" >> "$GITHUB_OUTPUT"
-            echo "COMPOSER_IGNORE_PLATFORM_REQ=ext-grpc" >> "$GITHUB_ENV"
-            echo "gRPC extension not available; allowing Composer to proceed without ext-grpc."
-          fi
-
       - uses: "ramsey/composer-install@v3"
 
       - name: Setup Problem Matchers for PHPUnit