Apply frontend validation to required fields in instance settings

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: Master
• Component/s: Sharing
• Labels: None
• Sprint: Col | Sprint 12 | Apr1 - Apr5
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/71668

Due to a limitation in the configuration framework at the moment company settings can't have required fields. We want to bypass this limitation to be able to notify users when they need to add a mandatory field (api keys in this case).