Revert "use /ci to trigger e2e"

This reverts commit 431e34f.

Signed-off-by: Shi, Crane <crane.shi@emc.com>

.github/workflows/e2e.yml

@@ -3,8 +3,8 @@ name: e2e
 on:
   push:
     branches: [ master ]
-  issue_comment:
-    types: [ created ]
+  pull_request_review:
+    types: [submitted]
 
 env:
   REGISTRY: 'ghcr.io/dell/csi-baremetal'
@@ -17,7 +17,7 @@ env:
 jobs:
   e2e:
     # we need to start validation on master push or on /ci comment in PR only
-    if: github.event_name == 'push' || (github.event.issue.pull_request && github.event_name == 'issue_comment' && startsWith(github.event.comment.body, '/ci'))
+    if: github.event_name == 'push' || github.event.review.state == 'approved'
     runs-on: ubuntu-20.04
     steps:
     - name: Get operator branch 
@@ -45,7 +45,7 @@ jobs:
       # Since the issue comment event runs against the main branch
       # we need to figure out a way to checkout the correct revision
       # if we want to work with the changes from a pull request.
-      if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/ci')
+      if: github.event.issue.pull_request_review
       id: sha
       uses: actions/github-script@v4
       with:
@@ -61,7 +61,7 @@ jobs:
 
     # Set ref if triggered from comment
     - name: Check out code
-      if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/ci')
+      if: github.event.issue.pull_request_review
       uses: actions/checkout@v2
       with:
         ref: '${{ steps.sha.outputs.result }}'