schemalate/firebolt: support arrays

[mdibaiee]

Description:

• Support arrays in materialize-firebolt
• Arrays will be saved as ARRAY(<INNER_TYPE>) on Firebolt (this includes nested arrays, so ARRAY(ARRAY(STRING)) is also valid)

Workflow steps:

Include an array field in field selection of a materialization, i.e.:

        nested_array:
          type: array
          description: a nested array
          items:
            type: array
            items:
              type: string

  acmeCo/firebolt/materialize-file-sizes:
    endpoint:
      flowSink:
        image: docker.io/library/materialize-firebolt:local
        config: acmeCo/materialize-firebolt.config.yaml
    bindings:
      - resource:
          table: files
          table_type: fact
        source: acmeCo/file-sizes
        fields:
          recommended: true
          include: { nested_array: {} } # <-------------

Documentation links affected:

N/A

Notes for reviewers:

This is what it looks like in Firebolt:

---

This change is 

[jgraettinger]

LGTM!