ci: create deployment manually

A few months ago, as a result of security recommendations from Github,
we adjusted PR Previews to be deployed via Workflow run.

This had the unintentional side-effect of making these deployments appear
as if they came from the "develop" branch, as `workflow_run` triggers
always run in the "develop" context.

I've done two things:

1. Adjusted the deployment job to now manually create deployments
   as opposed to using the Github native `environment` because environment
   does not support skipping automatic deployment creation:
   https://github.com/orgs/community/discussions/36919

2. Set the sha for the deployment from the calling workflow_run.

This makes the Github UI work as expected.

.github/workflows/deploy_preview.yml

@@ -24,9 +24,6 @@ jobs:
   deploy_daffio:
     name: Deploy Daff.io
     runs-on: ubuntu-latest
-    environment:
-      name: preview
-      url: ${{ steps.vercel.outputs.url }}
     if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'
     steps:
     - uses: graycoreio/github-actions/angular-universal-vercel-wflw-run@main
@@ -38,3 +35,25 @@ jobs:
         vercel-org: ${{ secrets.VERCEL_ORG }}
         vercel-project-id: ${{ secrets.VERCEL_DAFFIO_NEXT_PROJECT_ID }}
         ng-version: '17'
+    - name: Create Deployment
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const { data } = await github.rest.repos.createDeployment({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            ref: "${{ github.event.workflow_run.head_branch }}",
+            auto_merge: false,
+            required_contexts: [],
+            environment: 'preview'
+          });
+
+          await github.rest.repos.createDeploymentStatus({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            deployment_id: data.id,
+            state: 'success',
+            log_url: "${{ github.event.workflow_run.workflow_url }}",
+            environment_url: "${{ steps.vercel.outputs.url }}",
+            description: 'Deployment succeeded!',
+          });