Remove GitHub Action bot (#16632)

As the workflows are a lot more stable we no longer need the ability to easily re-run tests.

.github/workflows/github-action-bot.yml

@@ -1,25 +0,0 @@
-name: Keycloak GitHub bot
-
-# This GitHub bot listens on comments in the repository and reruns failed GitHub actions:
-# When adding a new comment '/rerun' as is on a pull request that is open, the bot will re-run any failed jobs in a workflow run.
-# The user commenting needs to be either a collaborator, an owner, a member of the organization or a contributor.
-
-# See https://github.com/keycloak/keycloak-gh-actionbot for more information
-
-on:
-  issue_comment:
-    types:
-      - created
-
-permissions:
-  actions: write
-  pull-requests: write
-
-jobs:
-  act:
-    runs-on: ubuntu-latest
-    steps:
-      # to avoid a tag being changed afterwards, use the commit hash of the action
-      - uses: keycloak/keycloak-gh-actionbot@a3d3f240f280983aa95cc82c9f61d1db5e66bb0c # v0.3.1
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}