fromFormat ZZZZ doesn't parse UTC, returns null

[ozten]

Describe the bug I am trying to parse a string like 11/15/23 00:51 UTC. I get { Invalid, reason: unparsable }.

To Reproduce These fail when added to test/datetime/tokenParse.test.js

 expect(DateTime.fromFormat("UTC", "ZZZZ").zoneName).toBe('UTC');  
 expect(DateTime.fromFormat('11/15/23 00:51 UTC', 'LL/dd/yy T ZZZZ').toMillis()).toBe(1700009460000);

These both fail.

Actual vs Expected behavior

DateTime.fromFormat should support ZZZZ formatting.

Desktop (please complete the following information):

Note: This is happening in NodeJS process as well as in the browser.

• OS: Mac OS X
• Browser Chrome 120.0.6099.62 (Official Build) (arm64)
• Luxon version 3.4.4
• Your timezone "America/Los_Angeles"

Additional context

[diesieben07]

Parsing has a separate table of tokens from formatting. This is due to limitations of the Intl API that Luxon uses, this is explained here.