Update integration tests for AIOHTTP default and async client lifecycle

[arandito]

Description

Updates integration tests and streaming examples for the upcoming Smithy Python client changes:

• Use the required Async-prefixed client names.
• Manage clients with async context managers.
• Use the default AIOHTTPClient transport for ordinary operations.
• Explicitly configure AWSCRTHTTPClient for bidirectional streaming workflows.
• Install the generated awscrt extra in bidirectional streaming examples.

Existing test setup, operation inputs, outputs, assertions, and workflows are otherwise unchanged. The Transcribe Medical Scribe workflow continues using one CRT client because it begins with a bidirectional operation.

Related Smithy Python Changes

• smithy-lang/smithy-python#781: defaults generated AWS clients to aiohttp and removes deprecated client aliases.
• smithy-lang/smithy-python#765: adds client and transport cleanup through close() and async context managers.
• aiohttp query and Content-Type fix: preserves URI query parameters and avoids adding an implicit Content-Type.
  • fixes operations for aws-sdk-qbusiness and aws-sdk-connecthealth after migration to aiohttp default

Installation

For tests requiring the CRT client, installation must now include the awscrt extra:

uv pip install -e ".[awscrt]" --group test

Testing

Successfully ran an internal development release that included:

• The aiohttp query and Content-Type fix
• The open PR to default generated clients to aiohttp and remove deprecated aliases
• This integration-test update

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[alexgromero]

🚢