Set clearLogs accelerator for log-rendering plugins

Summary:
Sets a default key binding of `ctrl+l` to clear the screen within built-in Flipper plugins which display a log view.

Motivation: A small quality of life improvement for developers used to the default "clear screen" binding. This makes our log-rendering plugins consistent with other native apps such as terminals, Chrome DevTools, and many others.

Reviewed By: mweststrate

Differential Revision: D37782638

fbshipit-source-id: 0a85b930faaa0e9468d5391f15092aad7b6057ee

desktop/pkg/src/__tests__/runInit.node.tsx

@@ -190,6 +190,7 @@ test.skip('It generates the correct files for client plugin', async () => {
         handler: async () => {
           data.set({});
         },
+        accelerator: 'ctrl+l',
       });
 
       return {data};
@@ -388,6 +389,7 @@ test.skip('It generates the correct files for device plugin', async () => {
         handler: async () => {
           data.set([]);
         },
+        accelerator: 'ctrl+l',
       });
 
       return {data};