Moves AsyncSelect component and tests to own folder (#13314)

diff --git a/superset-frontend/spec/javascripts/components/AsyncSelect_spec.jsx b/superset-frontend/src/components/AsyncSelect/AsyncSelect.test.jsx
similarity index 100%
rename from superset-frontend/spec/javascripts/components/AsyncSelect_spec.jsx
rename to superset-frontend/src/components/AsyncSelect/AsyncSelect.test.jsx
diff --git a/superset-frontend/src/components/AsyncSelect.jsx b/superset-frontend/src/components/AsyncSelect/index.jsx
similarity index 96%
rename from superset-frontend/src/components/AsyncSelect.jsx
rename to superset-frontend/src/components/AsyncSelect/index.jsx
index 93bbb34..1f2fb66 100644
--- a/superset-frontend/src/components/AsyncSelect.jsx
+++ b/superset-frontend/src/components/AsyncSelect/index.jsx
@@ -21,7 +21,7 @@
 // TODO: refactor this with `import { AsyncSelect } from src/components/Select`
 import { Select } from 'src/components/Select';
 import { t, SupersetClient } from '@superset-ui/core';
-import { getClientErrorObject } from '../utils/getClientErrorObject';
+import { getClientErrorObject } from '../../utils/getClientErrorObject';
 
 const propTypes = {
   dataEndpoint: PropTypes.string.isRequired,