Update workflow to allow manual prod releases via input

The build_and_deploy_job in azure-static-web-app.yml now runs
if the prod_release input is true, or for open pull requests.
This enables manual triggering of production releases in
addition to the existing PR-based deployment behavior.

Author: gvreddy04

.github/workflows/azure-static-web-app.yml

@@ -18,7 +18,7 @@ on:
 
 jobs:
   build_and_deploy_job:
-    if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.action != 'closed')
+    if: ${{ inputs.prod_release }} || (github.event_name == 'pull_request' && github.event.action != 'closed')
     runs-on: ubuntu-latest
     env:
       DOTNET_VERSION: "net10.0"