ci: remove stale disabled workflows (#1994)

Both are disabled in the Actions tab and have not run in months:

- Release Drafter (release-drafter.yml) and its config
  .github/release-drafter.yml: last run 2025-12-18
- Debug Discourse Posting (test-discourse.yaml.yml): one-off debug
  workflow from #1435, last run 2025-10-28

The post-to-discourse composite action is kept; the prebuilt workflow
still uses it. docs, stale and jenkins scan are also disabled here but
are inherited from commaai/openpilot and left in place to avoid
modify/delete conflicts on every upstream sync.


Claude-Session: https://claude.ai/code/session_01WAnUCRcA7Hp68qxyL11Wvm

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
Co-authored-by: James Vecellio-Grant <159560811+Discountchubbs@users.noreply.github.com>

.github/release-drafter.yml

@@ -1,43 +0,0 @@
-exclude-labels:
-  - 'no-changelog'
-categories:
-  - title: '🚀 Features'
-    labels:
-      - 'feature'
-      - 'enhancement'
-  - title: '🐛 Bug Fixes'
-    collapse-after: 5
-    labels:
-      - 'fix'
-      - 'bugfix'
-      - 'bug'
-  - title: '🧰 Maintenance'
-    collapse-after: 5
-    label: 'chore'
-change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
-change-title-escapes: '\<*_&'
-replacers:
-  - search: '/[Ss][Uu][Nn][Nn][Yy][Pp][Ii][Ll][Oo][Tt]/g'
-    replace: 'sunnypilot'
-  - search: '/\b[Ss][Pp]\b/g'
-    replace: 'SP'
-version-resolver:
-  major:
-    labels:
-      - 'major'
-  minor:
-    labels:
-      - 'minor'
-  patch:
-    labels:
-      - 'patch'
-  default: patch
-name-template: 'v$RESOLVED_VERSION 🚀'
-tag-template: 'v$RESOLVED_VERSION'
-version-template: "0.$MAJOR.$MINOR.$PATCH" # The day OP becomes v1, we need to bump this
-tag-prefix: "v0." # The day OP becomes v1, we need to bump this
-prerelease-identifier: "staging"
-template: |
-  ## Changes
-
-  $CHANGES

.github/workflows/release-drafter.yml

@@ -1,28 +0,0 @@
-name: Release Drafter
-
-on:
-  push:
-    branches:
-      - master
-    tags:
-      - 'v*'
-  pull_request_target:
-    types: [opened, reopened, synchronize]
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-jobs:
-  update_release_draft:
-    permissions:
-      contents: write
-      pull-requests: write
-    runs-on: ubuntu-latest
-    steps:
-      - uses: release-drafter/release-drafter@v6
-        with:
-          config-name: release-drafter.yml
-          prerelease: ${{ !startsWith(github.ref, 'refs/tags/v') }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test-discourse.yaml.yml

@@ -1,78 +0,0 @@
-name: Debug Discourse Posting
-
-on:
-  push:
-
-jobs:
-  test-discourse-post:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Post test message to Discourse
-        uses: ./.github/workflows/post-to-discourse
-        with:
-          discourse-url: ${{ vars.DISCOURSE_URL }}
-          api-key: ${{ secrets.DISCOURSE_API_KEY }}
-          api-username: ${{ secrets.DISCOURSE_API_USERNAME }}
-          topic-id: ${{ vars.DISCOURSE_UPDATES_TOPIC_ID }}
-          message: |
-            ## 🧪 Test Post from GitHub Actions
-            
-            **This is a test post to verify Discourse integration**
-            
-            - **Workflow**: ${{ github.workflow }}
-            - **Run Number**: #${{ github.run_number }}
-            - **Branch**: `${{ github.ref_name }}`
-            - **Commit**: ${{ github.sha }}
-            - **Actor**: @${{ github.actor }}
-            - **Timestamp**: ${{ github.event.head_commit.timestamp }}
-            
-            ---
-            
-            ### Fake Build Info (for testing)
-            - **Version**: 0.9.8-test
-            - **Build**: #42
-            - **Branch**: release-test
-            
-            [View workflow run](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
-            
-            *This is an automated test message. Drive safe! 🚗💨*
-      
-      
-      - name: Create topic on Discourse
-        uses: ./.github/workflows/post-to-discourse
-        with:
-          discourse-url: ${{ vars.DISCOURSE_URL }}
-          api-key: ${{ secrets.DISCOURSE_API_KEY }}
-          api-username: ${{ secrets.DISCOURSE_API_USERNAME }}
-          #topic-id: ${{ vars.DISCOURSE_UPDATES_TOPIC_ID }}
-          category-id: 4
-          title: "This is a test of a new topic instead of a reply"
-          message: |
-            ## 🧪 Test Post from GitHub Actions
-            
-            **This is a test post to verify Discourse integration**
-            
-            - **Workflow**: ${{ github.workflow }}
-            - **Run Number**: #${{ github.run_number }}
-            - **Branch**: `${{ github.ref_name }}`
-            - **Commit**: ${{ github.sha }}
-            - **Actor**: @${{ github.actor }}
-            - **Timestamp**: ${{ github.event.head_commit.timestamp }}
-            
-            ---
-            
-            ### Fake Build Info (for testing)
-            - **Version**: 0.9.8-test
-            - **Build**: #42
-            - **Branch**: release-test
-            
-            [View workflow run](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
-            
-            *This is an automated test message. Drive safe! 🚗💨*
-      - name: Display results
-        if: always()
-        run: |
-          echo "::notice::Discourse post test completed"
-          echo "Check your Discourse topic to verify the post appeared correctly"