Add a new option to clear the 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

@@ -101,9 +101,11 @@ export function getDependencyGraphOption(): DependencyGraphOption {
             return DependencyGraphOption.GenerateAndUpload
         case 'download-and-submit':
             return DependencyGraphOption.DownloadAndSubmit
+        case 'clear':
+            return DependencyGraphOption.Clear
     }
     throw TypeError(
-        `The value '${val}' is not valid for 'dependency-graph'. Valid values are: [disabled, generate, generate-and-submit, generate-and-upload, download-and-submit]. The default value is 'disabled'.`
+        `The value '${val}' is not valid for 'dependency-graph'. Valid values are: [disabled, generate, generate-and-submit, generate-and-upload, download-and-submit, clear]. The default value is 'disabled'.`
     )
 }
 
@@ -146,7 +148,8 @@ export enum DependencyGraphOption {
     Generate = 'generate',
     GenerateAndSubmit = 'generate-and-submit',
     GenerateAndUpload = 'generate-and-upload',
-    DownloadAndSubmit = 'download-and-submit'
+    DownloadAndSubmit = 'download-and-submit',
+    Clear = 'clear'
 }
 
 export enum JobSummaryOption {