Adapt dependency-graph support for new artifact API

- Don't upload artifacts when using 'generate-and-submit'
- New option 'generate-and-upload' to be used with 'download-and-submit'
- Use Artifact API for downloading in the same and different workflow

src/resources/init-scripts/gradle-build-action.github-dependency-graph.init.gradle

@@ -27,7 +27,6 @@ if (isTopLevelBuild) {
       new File(githubOutput) << "dependency-graph-file=${reportFile.absolutePath}\n"
   }
 
-
   println "Generating dependency graph into '${reportFile}'"
 }