[Feature] Micro-batch should allow copy_partitions

[jschintz-nytimes]

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-bigquery functionality, rather than a Big Idea better suited to a discussion

Describe the feature

Merging in BQ is great - but not always the most performant

Allow for the existing feature "copy_partitions" to be available in the microbatch incremental strategy

Describe alternatives you've considered

Write a custom strategy

Who will this benefit?

Anyone using microbatch

Are you interested in contributing this feature?

Maybe!

Anything else?

No response