feat(ci): integrate PHP apm-sdks-benchmarks into main pipeline

Add PHP benchmark jobs (laravel-realworld, symfony-realworld, wordpress)
from apm-sdks-benchmarks directly into the main GitLab pipeline so they
run against the tracer built at the current SHA.

Author: faydef

.gitlab-ci.yml

@@ -3,6 +3,12 @@ stages:
   - tests
   - deploy
   - ci-build
+  - php-laravel-realworld-parallel
+  - php-laravel-realworld-parallel-slo
+  - php-symfony-realworld-parallel
+  - php-symfony-realworld-parallel-slo
+  - php-wordpress-parallel
+  - php-wordpress-parallel-slo
 
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
@@ -18,6 +24,7 @@ include:
     ref: 5826819695d93286569e70ed087ae6bf906ce2c3
     file: templates/ci_authenticated_job.yml
   - local: .gitlab/ci-images.yml
+  - local: .gitlab/apm-sdks-benchmarks.yml
 
 generate-templates:
   stage: build

.gitlab/apm-sdks-benchmarks.yml

@@ -0,0 +1,10 @@
+include:
+  - project: 'DataDog/apm-reliability/apm-sdks-benchmarks'
+    file: '.gitlab/ci-php-laravel-realworld-parallel.yml'
+    ref: 'main'
+  - project: 'DataDog/apm-reliability/apm-sdks-benchmarks'
+    file: '.gitlab/ci-php-symfony-realworld-parallel.yml'
+    ref: 'main'
+  - project: 'DataDog/apm-reliability/apm-sdks-benchmarks'
+    file: '.gitlab/ci-php-wordpress-parallel.yml'
+    ref: 'main'