CI: remove unused worklow; use GITHUB_TOKEN where possible (#104657)

* remove unused worklow; use GITHUB_TOKEN where possible

* pin usages of checkout and setup-go

* Fix zizmor errors

* add zizmor.yml

* fix `changelog.yml`

* fix `core-plugins-build-and-release.yml`

* fix `release-comms.yml`

* update release-pr.yml and run-e2e-suite.yml

* Fix errors in files outside of .github/workflows

* Remove path filter on zizmor.yml

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Co-authored-by: Sven Grossmann <svennergr@gmail.com>
Co-authored-by: joshhunt <josh.hunt@grafana.com>

.github/workflows/codeowners-validator.yml

@@ -9,9 +9,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # Checks-out your repository, which is validated in the next step
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        with:
+          persist-credentials: false
       - name: GitHub CODEOWNERS Validator
-        uses: mszostok/codeowners-validator@v0.7.4
+        uses: mszostok/codeowners-validator@7f3f5e28c6d7b8dfae5731e54ce2272ca384592f
         # input parameters
         with:
           # ==== GitHub Auth ====