QDS-11960 Create testing infrastructure for x86_64

This MR brings the following features;

• Add testing stages for the x86_64 arch into the CI
• Create required testing infrastructure

cicd/stages/docker.yml

@@ -4,9 +4,9 @@ build-testing-docker:
   image: docker:stable
   services:
     - docker:dind
-  # rules: # only if dockerfile is changed
-  #   - changes:
-  #       - cicd/docker/Dockerfile
+  rules: # only if dockerfile is changed
+    - changes:
+        - cicd/docker/Dockerfile
   variables:
     GIT_SUBMODULE_STRATEGY: none
   script: