[Feature] Fix our implementation of Table Format and File Format Support

[amychen1776]

Is this your first time submitting a feature request?

• I have read the expectations for open source contributors
• I have searched the existing issues, and I could not find an existing issue for this feature
• I am requesting a straightforward extension of existing dbt-spark functionality, rather than a Big Idea better suited to a discussion

Describe the feature

Currently we support multiple formats (both table and file) in one field called file_format. This isn't correct and also doesn't align with our Iceberg project. We should split this up to table format and file format respectfully

Describe alternatives you've considered

N/A

Who will this benefit?

all users of dbt using Iceberg across multiple adapters

Are you interested in contributing this feature?

no

Anything else?

no