_validate_config() is out of date

[stscijgbot-jwql]

Issue JWQL-247 was created on JIRA by Bryan Hilbert:

The {}validate{}config() function in utils.py is out of date. New entries have been added to the config file recently, which have not been captured in this function. 

I found this was an issue when running test_validate_config() in test_utils.py. Note that this test is currently skipped on github actions because it says it requires access to the central store. (Does it actually? Looking over the function, it doesn't appear to actually need access to the central store.)