workflow: Add workflow to attach release assets

When a release is created this new workflow calls the other build
and test workflows and uploads the tested artifacts into github
release.
The existing workflows were modified to make them callable from other
workflows.
Also added zephyr.signed.bin as an artifact so that it can be added
as an asset to the github release.

Signed-off-by: Balaji Srinivasan <[email protected]>

.github/workflows/attach_release_assets.yml

@@ -0,0 +1,37 @@
+# Workflow that attaches additional assets to github release.
+name: Attach Release Assets
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  trigger-build:
+    uses: ./.github/workflows/build.yml
+
+  trigger-dfu-check:
+    uses: ./.github/workflows/dfu_check.yml
+
+  trigger-target-test:
+    uses: ./.github/workflows/on_target.yml
+
+  attach-assets:
+    runs-on: ubuntu-22.04
+    # Only make a release if the above jobs are passing
+    needs: [trigger-build, trigger-dfu-check, trigger-target-test]
+    steps:
+        - name: Download artifact
+          uses: actions/download-artifact@v4
+          with:
+           name: oob-t91x
+
+        - name: Rename artifacts
+          run: |
+            mv merged.hex hello.nrfcloud.com-${{ github.ref_name }}-thingy91x-debug-app.hex
+            mv app/zephyr/zephyr.signed.bin hello.nrfcloud.com-${{ github.ref_name }}-thingy91x-debug-app_update_signed.bin
+
+        - name: Deploy release to github
+          uses: softprops/action-gh-release@v1
+          with:
+            fail_on_unmatched_files: true
+            files: hello.nrfcloud.com-*.*

.github/workflows/build.yml

@@ -1,6 +1,7 @@
 name: Build
 
 on:
+  workflow_call:
   push:
     branches:
       - main

.github/workflows/dfu_check.yml

@@ -1,6 +1,7 @@
 name: DFU image compatibility check
 
 on:
+  workflow_call:
   push:
     branches:
       - main

.github/workflows/on_target.yml

@@ -1,6 +1,7 @@
 name: On_target
 
 on:
+  workflow_call:
   workflow_dispatch:
     inputs:
       run_test:
@@ -47,8 +48,11 @@ jobs:
       - name: Upload artifact
         uses: actions/upload-artifact@v4
         with:
-          name: oob-t91x-hex
-          path: thingy91x-oob/build/zephyr/merged.hex
+          name: oob-t91x
+          if-no-files-found: error
+          path: |
+            thingy91x-oob/build/merged.hex
+            thingy91x-oob/build/app/zephyr/zephyr.signed.bin
 
   test:
     if: github.event.inputs.run_test == 'yes' || github.event.inputs.run_test == '' || github.event.inputs.run_test == null