Wrap jest/renderer create abstraction in act for concurrent rendering (#44994)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44994

For RN monorepo tests, wrap `create` calls through our `jest/renderer` abstraction in `await act`.

This is a no-op under current React but will be required under `react-test-renderer@19` with `IS_REACT_ACT_ENVIRONMENT`.

Changelog: [Internal]

Reviewed By: yungsters

Differential Revision: D58650940

fbshipit-source-id: 4013af89dd7c9f447b2dd493989f3a4fdf2b6508

packages/react-native/Libraries/LogBox/UI/__tests__/__snapshots__/LogBoxInspectorSourceMapStatus-test.js.snap

@@ -101,6 +101,11 @@ exports[`LogBoxInspectorSourceMapStatus should render for pending 1`] = `
         "height": 14,
         "marginEnd": 4,
         "tintColor": "rgba(250, 186, 48, 1)",
+        "transform": Array [
+          Object {
+            "rotate": "0deg",
+          },
+        ],
         "width": 16,
       }
     }

packages/react-native/jest/renderer.js

@@ -11,11 +11,16 @@
 
 import type {ReactTestRenderer} from 'react-test-renderer';
 
+import nullthrows from 'nullthrows';
 import * as React from 'react';
 import TestRenderer from 'react-test-renderer';
 
 export async function create(
   Component: React.Element<any>,
 ): Promise<ReactTestRenderer> {
-  return TestRenderer.create(Component);
+  let component;
+  await TestRenderer.act(async () => {
+    component = TestRenderer.create(Component);
+  });
+  return nullthrows(component);
 }