Make reuse conformant (#509)

* Revert "Improve reuse test."

This reverts commit 7eddfda7f8.

* Revert "Update README."

This reverts commit b0ec28c6a1.

* Revert "Add exceptions."

This reverts commit c749421292.
(This commit got adjusted to changes in community.crypto.)

* Revert "Revert "Add .license file for vendored third-party certificates.""

This reverts commit 034b900a30.

* Remove no longer necessary REUSE workflow.

This is now checked by nox.

* Fix filenames.

* Update .gitignore.

.github/workflows/reuse.yml

@@ -1,38 +0,0 @@
----
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-name: Verify REUSE
-
-on:
-  push:
-    branches:
-      - main
-      - stable-*
-  pull_request:
-    branches:
-      - main
-      - stable-*
-  # Run CI once per day (at 09:00 UTC)
-  schedule:
-    - cron: '0 9 * * *'
-
-jobs:
-  check:
-    permissions:
-      contents: read
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-
-      - name: Remove some files before checking REUSE compliance
-        run: |
-          rm -f tests/integration/targets/*/files/*.pem
-          rm -f tests/integration/targets/*/files/roots/*.pem
-
-      - name: REUSE Compliance Check
-        uses: fsfe/reuse-action@v5