Change date-time formatting to respect user date format preference

[larsjuhw]

Proposed change

Make non-numeric date formatting consistent with the user's date format preference.

Fixes #22900

As the issue describes, the user setting for date format is not adhered to in non-numeric date representations. Since the setting does not specify that it only applies to numeric representations, this seems unintended.

This change makes written representations also follow the preference by using formatToParts to construct the appropriate output strings, just like formatDateNumeric already did.

Setting in /profile/general:

Result in a history graph:

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

In /profile/general, set "Language" to English and "Date format" to Year-Month-Day to see an example.

Additional information

• This PR fixes or closes issue: fixes Date format is not respected #22900

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.