Send flipper trace as a separate message

Summary:
This diff sends flipper trace as a separate message so that the form can update the state which can be used for validation. If the user doesn't click on "Flipper Trace" then it will show a validation error.

WWW side changes are here D17810526. Merge this diff only when www is landed.

Reviewed By: jknoxville

Differential Revision: D17812023

fbshipit-source-id: 35f17f9e58fc08cde3928072dc66758b1c507bcb

src/utils/supportRequestsFormUtils.tsx

@@ -32,6 +32,21 @@ export function appendTextInQuestionsField(webview: WebviewTag, text: string) {
   });
 }
 
+/**
+ *
+ * @param webview
+ * @param text
+ * This helper function is for appending flipper trace in the questions input text field.
+ * It also updates the Flipper trace state in the form which makes it pass the validation.
+ * One should use it only for the pages backed by NTUsersFormContainer.react.js
+ */
+export function sendFlipperTrace(webview: WebviewTag, text: string) {
+  webview.send('hostMessage', {
+    type: 'flipperTrace',
+    payload: text,
+  });
+}
+
 /**
  *
  * @param webview