Handle long import lines when linting.
Handle long import lines when linting.

Summary: I copied the logic for this from js_css_packages/analysis.py

Test Plan:
I modified a JS file and added two long import lines:

```
import "asdfaafdsafsdfasdfasdfasdfasdfdsfasdfadsfadfadsfsafsdfasfasdfasdfasdfasdfafadsfdasfdasfdsfasdfasdf";

import {foo, bar, baz, zoooooooooo, ping, pong} from "../shared-package/parse-query-string.js";
```

I confirmed that while I got other linting errors (unused variables, package not found). I got no errors about too-long lines.

Reviewers: csilvers, kevinb, jordan, briangenisio

Reviewed By: briangenisio

Differential Revision: https://phabricator.khanacademy.org/D33841

Khan/khan-linter,Khan/khan-linter,Khan/khan-linter,Khan/khan-linter