[ESLint] Move internal rules to eslint plugin

[weronikaolejniczak]

The purpose of this issue is to move our internally defined ESLint rules to our ESLint plugin. The goal is for consumers to be able to reuse useful warnings, e.g. css_logical_properties.

These rules are defined in: packages/eui/scripts/eslint-plugin

Acceptance criteria

• all internally defined rules are moved to packages/eslint-plugin:
  • packages/eui/scripts/eslint-plugin/css_logical_properties.js (in recommended)
  • packages/eui/scripts/eslint-plugin/forward_ref_display_name.js
  • packages/eui/scripts/eslint-plugin/i18n.js
  • packages/eui/scripts/eslint-plugin/rel.js (in recommended)
  • packages/eui/scripts/eslint-plugin/require_cypress_references.js
  • packages/eui/scripts/eslint-plugin/require_license_header.js
• only define rules in recommended if they make sense to be reused by consumers,
• rules like i18n and rel are renamed for clarity, the name should suggest the rule,
• if needed, rules are broken down into smaller ones,
• changes are tested in Kibana.