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/input-params.ts

@@ -51,7 +51,7 @@ export function getArguments(): string[] {
 }
 
 // Internal parameters
-export function getJobContext(): string {
+export function getJobMatrix(): string {
     return core.getInput('workflow-job-context')
 }
 
@@ -63,6 +63,10 @@ export function isJobSummaryEnabled(): boolean {
     return getBooleanInput('generate-job-summary', true)
 }
 
+export function isDependencyGraphEnabled(): boolean {
+    return getBooleanInput('generate-dependency-graph', true)
+}
+
 function getBooleanInput(paramName: string, paramDefault = false): boolean {
     const paramValue = core.getInput(paramName)
     switch (paramValue.toLowerCase().trim()) {