api_refs.yaml: Enh. PHP performance

Disable xdebug

- https://github.com/actions/runner-images/blob/ubuntu24/20250504.1/images/ubuntu/Ubuntu2404-Readme.md#php-tools
- https://github.com/marketplace/actions/setup-php-action#xdebug
- https://github.com/marketplace/actions/setup-php-action#disable-coverage

Author: adriendupuis

.github/workflows/api_refs.yaml

@@ -29,6 +29,11 @@ jobs:
               with:
                   ref: ${{ steps.version_and_branches.outputs.base_branch }}
 
+            - name: Disable PHP coverage
+              uses: shivammathur/setup-php@v2
+              with:
+                  coverage: none
+
             - name: Build API Refs
               env:
                   SATIS_NETWORK_KEY: ${{ secrets.SATIS_NETWORK_KEY }}