Configure Gradle User Home for dependency-graph

Instead of requiring an action step to generate the graph, configure Gradle User Home
so that subsequent Gradle invocations can generate a graph. Any generated graph files
are uploaded as artifacts on job completion.

- Construct job.correlator from workflow/job/matrix
- Export job.correlator as an environment var
- Upload artifacts at job completion in post-action step
- Specify the location of dependency graph report
- Only apply dependency graph init script when explicitly enabled

src/cache-base.ts

@@ -175,7 +175,8 @@ export class GradleStateCache {
         const initScriptFilenames = [
             'build-result-capture.init.gradle',
             'build-result-capture-service.plugin.groovy',
-            'github-dependency-graph.init.gradle'
+            'github-dependency-graph.init.gradle',
+            'github-dependency-graph-gradle-plugin-apply.groovy'
         ]
         for (const initScriptFilename of initScriptFilenames) {
             const initScriptContent = this.readInitScriptAsString(initScriptFilename)