Add kudu support

[kennycontreras]

Describe your changes

Added Kudu support providing the option to set primary key when materializing tables (option required by Kudu).

Before this, dbt-impala could only materialize views, but when it came time to create tables, it failed because of the primary key requirements.

Internal Jira ticket number or external issue link

Testing procedure/screenshots(if appropriate):

Checklist before requesting a review

• I have performed a self-review of my code
• I have formatted my added/modified code to follow pep-8 standards
• I have checked suggestions from python linter to make sure code is of good quality.

[niteshy]

Thanks @kennycontreras for adding the kudu support. Can you please add the appropriate tests too?

[kennycontreras]

Thanks @kennycontreras for adding the kudu support. Can you please add the appropriate tests too?

I'll add the test as soon as possible! Thanks