The `ModelPackage.create` method is not using the provided `tags`

[diogomafra]

Describe the bug
The ModelPackage.create method is not using the provided tags.

To reproduce

import sagemaker
from sagemaker import ModelPackage
from sagemaker.serverless import ServerlessInferenceConfig

model_package_arn = "...."
model_package_name = "something"
tags = [{'Key': 'tagname', 'Value':'tagvalue'}]

# define the model package
model_package = ModelPackage(
    role=role,
    model_package_arn=model_package_arn,
    sagemaker_session=sagemaker.Session(),
    name=model_package_name,
)

# call create passing tags
model_package.create(
    instance_type="aa",
    serverless_inference_config=ServerlessInferenceConfig(memory_size_in_mb=1024),
    tags=tags
)

Expected behavior
The Model should be created with the provided tags.

Screenshots or logs

Here are the logs generated when calling create.

Creating model with name: something
CreateModel request: {
    "ModelName": "something",
    "ExecutionRoleArn": "arn:aws:iam::REDACTED:role/service-role/REDACTED",
    "Containers": [
        {
            "ModelPackageName": "arn:aws:sagemaker:us-east-1:REDACTED:model-package/something/8"
        }
    ]
}

System information
sagemaker==2.107.0

Additional context
After looking at the source code, it's clear the problem is in the _create_sagemaker_model implementation of the ModelPackage class (code here). While the same method in the Model class passes the tags to create_model (code here), the ModelPackage does not.

[trungleduc]

Fixed in #3919