feat(explore): SQL popover in datasource panel (#19308)

* feat(explore): SQL popover in datasource panel

* Fix acequire not defined

* Rebase and fix tests

* Disable highlighting gutter

* Use ace-build acequire instead of brace

superset-frontend/src/SqlLab/components/TemplateParamsEditor/TemplateParamsEditor.test.tsx

@@ -24,7 +24,6 @@ import {
   getByText,
   waitFor,
 } from 'spec/helpers/testing-library';
-import brace from 'brace';
 import { ThemeProvider, supersetTheme } from '@superset-ui/core';
 
 import TemplateParamsEditor from 'src/SqlLab/components/TemplateParamsEditor';
@@ -48,8 +47,6 @@ describe('TemplateParamsEditor', () => {
       { wrapper: ThemeWrapper },
     );
     fireEvent.click(getByText(container, 'Parameters'));
-    const spy = jest.spyOn(brace, 'acequire');
-    spy.mockReturnValue({ setCompleters: () => 'foo' });
     await waitFor(() => {
       expect(baseElement.querySelector('#ace-editor')).toBeInTheDocument();
     });

superset-frontend/src/SqlLab/components/TemplateParamsEditor/index.tsx

@@ -74,7 +74,6 @@ function TemplateParamsEditor({
         syntax.
       </p>
       <StyledConfigEditor
-        keywords={[]}
         mode={language}
         minLines={25}
         maxLines={50}