[PP1] Improve Datetime validation to be specific to Date or Time input

Problem/Motivation

Follow up for 🐛 Remove sample date from date field error message and title attribute Fixed , from usability review in https://www.drupal.org/project/drupal/issues/2791693#comment-14972254 🐛 Remove sample date from date field error message and title attribute Fixed

In a follow-up issue, we should explore making the validation specific to the individual date or time elements, right now if the error is triggered by the time element, both the date and time elements are highlighted in red. This is not ideal, and we should find a way to highlight the specific element that is causing the error.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet