feat(datetime): formatOptions property for Datetime

[mapsandapps]

Issue number: Internal

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What is the current behavior?

The Datetime header, Datetime time button, and Datetime Button have default date formatting that cannot be set by the developer.

What is the new behavior?

• The developer can customize the date and time formatting for the Datetime header and time button
• The developer can customize the date and time formatting for the Datetime Button
• A warning will appear in the console if they try to provide a time zone (the time zone will not get used)
• A warning will be logged if they do not include the date or time object for formatOptions as needed for the presentation of the Datetime

Does this introduce a breaking change?

• [ ] Yes
• [x] No

Other information

These changes have been reviewed in #29009 and #29059. This PR just adds them to the feature branch now that the separate tickets are complete.