Field Storage Configuration UI: Accuracy and Bounds wrt UTC storage

https://git.drupalcode.org/project/xdate/-/blob/c4c9995862a16869c117ce21...

Problem/Motivation

Different backends allow for different accuracy and minimum maximum storage. The local column will store the data correctly, the UTC column may not depending.

Proposed resolution

Provide user feedback or restrictions related to the options selected.

Remaining tasks

Decide how and where it is best to do this.