[8.9] chore(NA): remove debug step on auto approve backport action (#…

…160826) (#160829)

# Backport

This will backport the following commits from `main` to `8.9`:
- [chore(NA): remove debug step on auto approve backport action
(#160826)](#160826)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Tiago
Costa","email":"[email protected]"},"sourceCommit":{"committedDate":"2023-06-28T23:09:20Z","message":"chore(NA):
remove debug step on auto approve backport action (#160826)\n\nI believe
I found out what was wrong with the previous implementation of\r\nthe
action.\r\nWe were trying to check for the existence of the backport
label when the\r\nPR is created which is never there (as it gets added
afterwards).\r\n\r\nThis PR is replacing the checking of the label by
the assert that the\r\nbranch name on a backport starts with `backport`
and the creator of the\r\nPR is
kibanamachine.","sha":"5ac939091605a115420fa6e47307e70c2a157d9d","branchLabelMapping":{"^v8.10.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["chore","Team:Operations","release_note:skip","backport:all-open","v8.10.0"],"number":160826,"url":"https://github.com/elastic/kibana/pull/160826","mergeCommit":{"message":"chore(NA):
remove debug step on auto approve backport action (#160826)\n\nI believe
I found out what was wrong with the previous implementation of\r\nthe
action.\r\nWe were trying to check for the existence of the backport
label when the\r\nPR is created which is never there (as it gets added
afterwards).\r\n\r\nThis PR is replacing the checking of the label by
the assert that the\r\nbranch name on a backport starts with `backport`
and the creator of the\r\nPR is
kibanamachine.","sha":"5ac939091605a115420fa6e47307e70c2a157d9d"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v8.10.0","labelRegex":"^v8.10.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/160826","number":160826,"mergeCommit":{"message":"chore(NA):
remove debug step on auto approve backport action (#160826)\n\nI believe
I found out what was wrong with the previous implementation of\r\nthe
action.\r\nWe were trying to check for the existence of the backport
label when the\r\nPR is created which is never there (as it gets added
afterwards).\r\n\r\nThis PR is replacing the checking of the label by
the assert that the\r\nbranch name on a backport starts with `backport`
and the creator of the\r\nPR is
kibanamachine.","sha":"5ac939091605a115420fa6e47307e70c2a157d9d"}}]}]
BACKPORT-->

Co-authored-by: Tiago Costa <[email protected]>

.github/workflows/auto-approve-backports.yml

@@ -12,8 +12,8 @@ jobs:
     name: Auto-approve backport
     runs-on: ubuntu-latest
     if: |
-      contains(github.event.pull_request_target.labels.*.name, 'backport') &&
-      github.event.pull_request_target.user.login == 'kibanamachine'
+      startsWith(github.event.pull_request.head.ref, 'backport') &&
+      github.event.pull_request.user.login == 'kibanamachine'
     permissions:
       pull-requests: write
     steps: