ci: group cloud, desktop, mobile in one release workflow (#12802)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Introduced new workflows for preparing releases, cloud deployment, and
coordinated multi-platform releases with manual approval for stable
Docker images.
- Added a reusable action to output app version, Git hash, and build
type for consistent release metadata.

- **Refactor**
- Simplified and unified input handling across workflows, requiring
explicit version and build metadata inputs.
- Updated release workflows (desktop, mobile, cloud) to use direct
inputs instead of deriving values internally.

- **Chores**
- Removed several legacy and redundant workflows, including automatic
deployment, release, label checking, auto-assign, and Helm chart
publishing.
- Deleted jobs and workflows related to self-hosted image builds, mobile
app test builds, and previous deployment processes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/build-test.yml

@@ -1359,15 +1359,6 @@ jobs:
         run: |
           yarn affine @affine/electron node ./scripts/macos-arm64-output-check.ts
 
-  test-build-mobile-app:
-    uses: ./.github/workflows/release-mobile.yml
-    with:
-      build-type: canary
-      build-target: development
-    secrets: inherit
-    permissions:
-      id-token: 'write'
-
   test-done:
     needs:
       - analyze
@@ -1398,7 +1389,6 @@ jobs:
       - desktop-test
       - desktop-bundle-check
       - cloud-e2e-test
-      - test-build-mobile-app
     if: always()
     runs-on: ubuntu-latest
     name: 3, 2, 1 Launch