quote columns for foreign key and primary key constraints, if quote: true in column config

[samuelberntzen]

Quotes/backticks are not applied for foreign key and primary key constraints in 1.10.0a1, even if the column's config specifies quote: true. By retrieving the (optional) quote argument from the column config in parse_column_constraints we can apply backticks to the constraint definition.

Resolves #965

Description

Modifies the parse_column_constraints to dynamically apply backticks on columns with foreign key and primary key constraints, if specified in the model's configuration:

    columns:
      - name: speciål_char_pk
        data_type: string
        quote: true
        constraints:
          - type: not_null
          - type: primary_key

Checklist

• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• [] I have updated the CHANGELOG.md and added information about my change to the "dbt-databricks next" section.

[benc-db]

Thanks for opening. Will run tests today.