Add visual review toolbar to review apps

Related to #340088 (closed)

What's in this MR?

• Adds the visual review toolbar to review apps (i.e. when CI=true)

See it live

Changes to review-deploy CI/CD job

This has been generated using this reproducibility documentation:

diff --git a/master.out b/branch.out
index 716190a..c8ec562 100644
--- a/master.out
+++ b/branch.out
@@ -92,6 +92,11 @@ gitlab:
         initialDelaySeconds: 5
         periodSeconds: 15
         timeoutSeconds: 5
+    extraEnv:
+      REVIEW_APPS_ENABLED: "true"
+      REVIEW_APPS_MERGE_REQUEST_IID: "9876"
     image:
       repository: registry.gitlab.com/gitlab-org/build/cng-mirror/gitlab-webservice-ee
       tag: local-branch