Feat: parse project location when passed full resource name to get apis

[morgandu]

• add _get_and_validate_project_location for resource_name in AiPlatformResourceNoun in base.py
• pass in resource_name for AiPlatformResourceNoun subclasses.

unit tests:

• add tests through dataset.Dataset
• add tests through training_jobs.CustomTrainingJob.get

Fixes <b/180923329>

[sasha-gitg]

I think this check needs to happen earlier in the stack than _get_gca_resource because the project/location of the object get set before this:

https://github.com/googleapis/python-aiplatform/blob/dev/google/cloud/aiplatform/datasets/dataset.py#L73
->
https://github.com/googleapis/python-aiplatform/blob/dev/google/cloud/aiplatform/base.py#L279

In this current implementation the location attribute and project attribute on the object may match the resource and client.

I think the most direct way to support this is to to add something like this to the AIPlatformResourceNoun base class:

def _get_and_validate_project_location(cls, project, location, resource_name_or_id):
  if not project and not location:   # no issue
    return project, location
  
  fields = extract_fields_from_resource_name(resource_name_or_id, cls._resource_noun)
  if not fields:  # not a resource name
        return project, location
 
  # skip validating project because it's not needed and would require we correlate project no. with project ids 

  if location and field.location != location:  # this is a problem
      raise runtimeerror
  
  return fields.project, fields.location

And update the constructor with the something like:

def __init__(self, project: Optional, location: Optional, creds: Optional, resource_name_or_id: Optional[str]):
    if resource_name_or_id:
      project, location = self._get_and_validate_project_location(project, location, resource_name_or_id)
    ...

And update subclass call sites to pass in the resource noun in the constructor.

[sasha-gitg]

LGTM! Thanks Morgan!