Allow lists of basemodel objects in omegaconf

[brandonrising]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update
• Community Node Submission

Have you discussed this change with the InvokeAI team?

• Yes
• No, because:

Have you updated all relevant documentation?

• Yes
• No

Description

Prior to this PR, invokeai-configure crashes when it attempts to process the remote_api_tokens config due to it not containing primitive objects. This detects Basemodels as well as lists of BaseModels and converts them to dicts that omegaconf can handle.

QA Instructions, Screenshots, Recordings

• Create an invokeai.yaml file with a list of remote_api_tokens similar to those below

  Model Install:
    remote_api_tokens:
    - url_regex: .*
      token: test1
    - url_regex: .*
      token: test2
    - url_regex: .*
      token: test3
    - url_regex: .*
      token: test4

• Run invokeai-configure defined on this branch. Validate the script neither crashes nor rewrites your invokeai.yaml file without the configs above.

Merge Plan

This PR can be merged when approved