Screen Reader does not announce status message after invoking 'Add Row' control under 'Add Table Row' pane. (#1837)

* [accessibility-3100026]: [Screen Reader - Azure Cosmos DB - Add Table Row]: Screen Reader does not announce status message after invoking 'Add Row' control under 'Add Table Row' pane.

* Fixed format.

* Snap update.

---------

Co-authored-by: Satyapriya Bai <v-satybai@microsoft.com>

src/Explorer/Panes/RightPaneForm/RightPaneForm.tsx

@@ -2,6 +2,7 @@ import React, { CSSProperties, FunctionComponent, ReactNode } from "react";
 import { PanelFooterComponent } from "../PanelFooterComponent";
 import { PanelInfoErrorComponent } from "../PanelInfoErrorComponent";
 import { PanelLoadingScreen } from "../PanelLoadingScreen";
+import { labelToLoadingItemName } from "Explorer/Tables/Constants";
 
 export interface RightPaneFormProps {
   formError: string;
@@ -27,6 +28,10 @@ export const RightPaneForm: FunctionComponent<RightPaneFormProps> = ({
   const handleOnSubmit = (event: React.FormEvent<HTMLFormElement>) => {
     event.preventDefault();
     onSubmit();
+    const screenReaderStatusElement = document.getElementById("screenReaderStatus");
+    if (screenReaderStatusElement) {
+      screenReaderStatusElement.innerHTML = labelToLoadingItemName[submitButtonText] || "Loading";
+    }
   };
 
   return (
@@ -42,6 +47,7 @@ export const RightPaneForm: FunctionComponent<RightPaneFormProps> = ({
           />
         )}
       </form>
+      <span role="status" className="screenReaderOnly" id="screenReaderStatus"></span>
       {isExecuting && <PanelLoadingScreen />}
     </>
   );

src/Explorer/Panes/RightPaneForm/__snapshots__/RightPaneForm.test.tsx.snap

@@ -1782,5 +1782,10 @@ exports[`Right Pane Form should render Default properly 1`] = `
       </div>
     </PanelFooterComponent>
   </form>
+  <span
+    className="screenReaderOnly"
+    id="screenReaderStatus"
+    role="status"
+  />
 </RightPaneForm>
 `;