New Rule: Requiring hbs`` literals

It's possible to use ```hbs(`foo`)```, but this usage style is frowned upon by Embroider (https://github.com/embroider-build/embroider/blob/031ce6d8a3137f5df6106be26c336b92ed948717/packages/core/src/babel-plugin-inline-hbs.ts#L212)
It'd be nice to have a lint rule to catch it.

### Bad:
```js
import { render } from '@ember/test-helpers';
import { hbs } from 'ember-cli-htmlbars';

render(hbs(`test`)); // has wrapping parens, breaking the hbs template literal
```

### Fixed version:
```js
import { render } from '@ember/test-helpers';
import { hbs } from 'ember-cli-htmlbars';

render(hbs`test`);
```