feat: add AWS_SMUS connector type

[zaman-atlan]

Description

AtlanConnectorType has no entry for AWS SageMaker Unified Studio, whose connector name is aws-smus. Without it, Connection.creator(connector_type=...) can't create an SMUS connection, and scripts have to fall back to AtlanConnectorType.CREATE_CUSTOM.

This adds AWS_SMUS = ("aws-smus", AtlanConnectionCategory.SAAS) next to AWS_SAGEMAKER. The category is SaaS because that's what the Atlan UI sets on the SMUS connections it creates. atlan-publish-app also takes partial-Connection categories from this enum and falls back to custom for slugs it doesn't know, so once it picks up this version, SMUS partial connections get SaaS too.

pyatlan_v9 re-exports this enum, so it needs no separate change. atlan-java gets the same entry in atlanhq/atlan-java#2812.

Jira link: n/a

Type of change

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

How has this been tested?

On this branch:

• AtlanConnectorType("aws-smus") returns AWS_SMUS, and .category.value is "SaaS".
• get_connector_name("default/aws-smus/<epoch>") returns aws-smus, and _get_connector_type_from_qualified_name returns AWS_SMUS rather than a custom type.
• Connection.creator(client=<mock>, name="smus-test", connector_type=AtlanConnectorType.AWS_SMUS, admin_users=[...]) builds default/aws-smus/<epoch> with connector_name="aws-smus" and category="SaaS".
• pyatlan_v9.model.enums.AtlanConnectorType.AWS_SMUS is the same member.
• ruff format --check and ruff check (0.15.22) pass on the file.
• pytest tests/unit: 7206 passed, 5 skipped. pytest tests_v9/unit: 7919 passed, 5 skipped.

Checklist

• My code follows the project's style guidelines
• I've performed a self-review of my code
• I've added comments in tricky or complex areas (n/a, single enum entry)
• I've updated the documentation as needed (n/a)
• There are no new warnings from my changes
• I've added tests to cover my changes (single enum entry, same as PARTCON-28: Add INFORMATICA_POWERCENTER connector type #979)
• All new and existing tests pass locally

🤖 Generated with Claude Code

[Aryamanz29]

LGTM - thanks!