[FEA][JSON] Support custom date and timestamp formats in to_json

[andygrove]

Is your feature request related to a problem? Please describe.
PR #9600 adds support for date and timestamp types in to_json but only supports the default date and time formats.

Describe the solution you'd like
I would like to support custom formats. We need to determine which formats we can and cannot support and add appropriate tests.

These are the JSON options that control the date and timestamp formats:

• timeZone
• dateFormat
• timestampFormat
• timestampNTZFormat

Describe alternatives you've considered
None

Additional context
None

[mattahrens]

Should this be added to the JSON epic? #9458

[andygrove]

Should this be added to the JSON epic? #9458

I went ahead and added it. This epic was initially supposed to be focused on the highest-priority items based on customer requirements, and I am not aware that this issue qualifies for that, but it seems like a good place to track all these related tasks.