feat(datastore): refactor datastore category to use APICategoryGraphQLBehavior

[5d]

Issue #

Description

• refactor datastore category to use APICategoryGraphQLBehavior
• remove the indirect dependency of the aws-sdk-swift library on the datastore category

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.