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/actions/deploy/action.yml

@@ -1,9 +1,6 @@
 name: 'Deploy to Cluster'
 description: 'Deploy AFFiNE Cloud to cluster'
 inputs:
-  build-type:
-    description: 'Align with App build type, canary|beta|stable|internal'
-    default: 'canary'
   gcp-project-number:
     description: 'GCP project number'
     required: true
@@ -36,5 +33,3 @@ runs:
     - name: Deploy
       shell: bash
       run: node ./.github/actions/deploy/deploy.mjs
-      env:
-        BUILD_TYPE: '${{ inputs.build-type }}'