SG-34359 Add field type `entity_type` to mockgun as simple str

[slingshotvfx]

For testing purposes, it can be helpful to support entity_type field types, even if there's no validation that it's an existing Entity from the schema.

[carlos-villavicencio-adsk]

Hello, thank you for the contribution. Can you provide a use case when this is helpful? Cheers

[slingshotvfx]

Hey Carlos,

I was adding tests for code that creates ActionMenuItems on a site through the Python API. So I wanted to assert they were created in Mockgun.

The following code:

    sg_amis = mockgun.find(
        "ActionMenuItem",
        filters=[],
        fields=[
            "title",
            "entity_type",
        ],
    )

results in ShotgridError: Field ActionMenuItem.entity_type: Handling for ShotGrid type entity_type is not implemented

As far as I can tell, entity_type fields in Shotgrid are just text fields, maybe limited to a specific set of values matching the entities available in the Shotgrid site. I suppose in Mockgun you could add some validation to verify that the value of entity_type fields exists as an entity name in the Schema, but for my purposes just setting it to a string worked great.

Thanks!

[carlos-villavicencio-adsk]

I think it's a good idea to add entity_type. Thanks. Our team will review this and merge as soon as they can.