refactor: Use usernames for E2E trigger permissions

We were using pull_request.author_association field to
check permission of the author of a pull request but as
GitHub has deprecated the field and announced to remove
the filed in recent blog, this commit continue using old
workaround for E2E trigger permissions.

Signed-off-by: Zaki Shaikh <zashaikh@redhat.com>

Author: zakisk

.github/workflows/e2e.yaml

@@ -31,8 +31,7 @@ jobs:
     if: >
       github.event_name == 'schedule' ||
       github.event_name == 'workflow_dispatch' ||
-      (github.event_name == 'pull_request_target' && 
-       contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR", "CONTRIBUTOR"]'), github.event.pull_request.author_association))
+      (github.event_name == 'pull_request_target' && contains(fromJSON('["zakisk", "infernus01", "savitaashture", "chmouel", "vdemeester", "enarha", "aThorp96", "waveywaves", "dependabot[bot]"]'), github.event.pull_request.user.login))
     concurrency:
       group: ${{ github.workflow }}-${{ matrix.provider }}-${{ github.event.pull_request.number || github.ref_name }}
       cancel-in-progress: true