Fix actions lint (#36029)

actionlint since https://github.com/rhysd/actionlint/releases/tag/v1.7.9
detects constant conditions and this workflow was being disabled in
58d2a87c6c
by such a condition which made the lint fail:


https://github.com/go-gitea/gitea/actions/runs/19673752806/job/56349128912?pr=36028

Instead, remove the whole workflow file. I'm sure we can re-create it if
the need arises.

Also, I locked the actionlint dependency to prevent similar surprises in
the future.

.github/workflows/pull-e2e-tests.yml

@@ -1,35 +0,0 @@
-name: e2e-tests
-
-on:
-  pull_request:
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  files-changed:
-    uses: ./.github/workflows/files-changed.yml
-
-  test-e2e:
-    # the "test-e2e" won't pass, and it seems that there is no useful test, so skip
-    # if: needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.frontend == 'true' || needs.files-changed.outputs.actions == 'true'
-    if: false
-    needs: files-changed
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v5
-      - uses: actions/setup-go@v6
-        with:
-          go-version-file: go.mod
-          check-latest: true
-      - uses: pnpm/action-setup@v4
-      - uses: actions/setup-node@v5
-        with:
-          node-version: 24
-      - run: make deps-frontend frontend deps-backend
-      - run: pnpm exec playwright install --with-deps
-      - run: make test-e2e-sqlite
-        timeout-minutes: 40
-        env:
-          USE_REPO_TEST_DIR: 1