Allow loading locally stored models in workflows

[grzegorz-roboflow]

What does this PR do?

When ALLOW_INFERENCE_MODELS_DIRECTLY_ACCESS_LOCAL_PACKAGES is set, model ID like "/path/to/model/dir" should be accepted. Currently model manager tries to check the model type by making call to Roboflow API resulting in error (since "/path/to/model/dir" is not correct Roboflow model ID). This change fixes this behavior so locally stored models can be loaded and used with workflows.

Type of Change

• New feature (non-breaking change that adds functionality)

Testing

• I have tested this change locally

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in hard-to-understand areas
• My changes generate no new warnings or errors
• I have updated the documentation accordingly (if applicable)

Additional Context

N/A