Add a run with opcache to the coverage job

Some tests are not run when OPcache is not available.
This should make the results more accurate.

Author: villfa

azure-pipelines.yml

@@ -86,3 +86,4 @@ jobs:
       parameters:
         configurationName: COVERAGE_DEBUG_ZTS
         configurationParameters: '--enable-debug --disable-maintainer-zts'
+        timeoutInMinutes: 90

azure/coverage_job.yml

@@ -29,6 +29,13 @@ jobs:
       parameters:
         configurationName: ${{ parameters.configurationName }}
         runTestsParameters: ${{ parameters.runTestsParameters }}
+    - template: test.yml
+      parameters:
+        configurationName: ${{ parameters.configurationName }}
+        runTestsName: 'OpCache'
+        runTestsParameters: >-
+          ${{ parameters.runTestsParameters }}
+          -d zend_extension=opcache.so
     - script: |
         make gcovr-xml
         mv gcovr.xml coverage.xml