refactor: directly build add-on (#435)

### Description

This PR brings the code from
https://github.com/splunk/addonfactory-ucc-generator-action/tree/main
and aims to deprecate this repository in favor of supporting less.

### Checklist

- [ ] `README.md` has been updated or is not required
- [ ] push trigger tests
- [ ] manual release test
- [ ] automated releases test
- [x] pull request trigger tests
- [ ] schedule trigger tests
- [ ] workflow errors/warnings reviewed and addressed

### Testing done 

*
splunk/splunk-add-on-for-okta-identity-cloud#373
- I downloaded the built add-on and it looks okay but I did not check
every single file

Author: artemrys

.github/workflows/reusable-build-test-release.yml

@@ -638,9 +638,18 @@ jobs:
           cp -f THIRDPARTY package/THIRDPARTY || echo "THIRDPARTY file not found (allowed for PR and schedule)"
       - name: Build Package
         id: uccgen
-        uses: splunk/[email protected]
-        with:
-          version: ${{ steps.BuildVersion.outputs.VERSION }}
+        run: |
+          ucc-gen --ta-version ${{ steps.BuildVersion.outputs.VERSION }}
+          if [ -f package.json ]
+          then
+            yarn
+            if [ -n ${{ steps.BuildVersion.outputs.VERSION }} ]
+            then
+              yarn version --new-version ${{ steps.BuildVersion.outputs.VERSION }} --no-git-tag-version
+            fi
+            yarn run build
+          fi
+          echo "OUTPUT=output/$(ls output/)" >> "$GITHUB_OUTPUT"
       - name: Slim Package
         id: slim
         run: |