Add new option to clear dependency-graph

When changing workflow names or when changing to the new 'dependency-submission'
action, it can be useful to clear existing dependency graph snapshots from previous
submissions. While the old graphs will eventually "age out", the 'clear' option will
submit an empty dependency graph for an existing Job correlator, ensuring that old
dependency graphs don't linger.

src/input-params.ts

@@ -82,6 +82,8 @@ export function getDependencyGraphOption(): DependencyGraphOption {
             return DependencyGraphOption.GenerateAndSubmit
         case 'download-and-submit':
             return DependencyGraphOption.DownloadAndSubmit
+        case 'clear':
+            return DependencyGraphOption.Clear
     }
     throw TypeError(
         `The value '${val} is not valid for 'dependency-graph. Valid values are: [disabled, generate-and-upload, generate-and-submit, download-and-submit]. The default value is 'disabled'.`
@@ -122,5 +124,6 @@ export enum DependencyGraphOption {
     Disabled,
     Generate,
     GenerateAndSubmit,
-    DownloadAndSubmit
+    DownloadAndSubmit,
+    Clear
 }