Is this a new bug in dbt-redshift?

• I believe this is a new bug in dbt-redshift
• I have searched the existing issues, and I could not find an existing issue for this bug

Current Behavior

If you set the dist key in a model.yml file like

version: 2
models:
  - name: a_real_table
    config:
      sort:
        - primary_key
        - foreign_key
      dist:
        - primary_key

dbt will throw the following error

list has no attribute strip

Which is generic and non descriptive of what the user should fix. The issue is that since dist keys can only be single valud properties it should be specified as dist: primary_key.

Expected Behavior

A better message that isn't exposing the underlying python machinery and indicates what the user should do to fix the issue e.g. Single valued properties cannot be specified as a list

Steps To Reproduce

See Current Behaviour. If you set up a model like that in any dbt project you will reproduce the error

Relevant log output

No response

Environment

- OS: Mac
- Python: 3.9
- dbt-core:
- dbt-redshift: 1.3.0

Additional Context

No response