Merge pull request #4332 from DataDog/cbeauchesne/system-tests-parameter

Use official parametric scenario parameters

Author: lloeki

.github/workflows/system-tests.yml

@@ -481,5 +481,5 @@ jobs:
     with:
       library: ruby
       binaries_artifact: system_tests_binaries
-      _experimental_job_count: 8
-      _experimental_job_matrix: "[1,2,3,4,5,6,7,8]"
+      job_count: 8
+      job_matrix: "[1,2,3,4,5,6,7,8]"