Add datafusion.format.* configs test coverage #21354
Description
Is your feature request related to a problem or challenge?
Currently, DataFusion supports 9 datafusion.format.* configs but their test coverage seem to be missed so this issue aims to add comprehensive test coverage for them. This is follow-up to recent config framework improvements: #20372 and #20816.
Describe the solution you'd like
Explained at the first section.
Describe alternatives you've considered
No response
Additional context
No response