Align eslint rules for js & ts files

[mshustov]

Kibana codebase is migrating to typescript, but our linter setup is still out of sync for *.js & *.ts files. For example, we don't enforce a lot of import/* eslint-plugin rules for *.ts files.
https://github.com/elastic/kibana/blob/master/packages/eslint-config-kibana/javascript.js#L92-L100
We need to sync rules for both *.js & *.ts files and fix already leaked violations.

[elasticmachine]

Pinging @elastic/kibana-operations (Team:Operations)

[watson]

It's been a while since this issue was raised, and we've come a long way in converting to TypeScript. Is this still a problem, or can we close this issue?

[mistic]

I think this issue is still applying to some options missing sync between both envs. Not high priority though