Python: add AzureAIAgent, OpenAIAssistant and OpenAIResponsesAgent In…

…tegration tests, AzureAIAgent FCC gen bug fix (microsoft#11394)

### Motivation and Context

AzureAIAgents, OpenAIAssistantAgents, and OpenAIResponsesAgents
previously were not covered by integration tests. Adding a set of
integration tests to cover high-level usage of an AzureAIAgent and
OpenAIAssistantAgents for `get_response`, `invoke`, and `invoke_stream`.

As part of this work, a previous fix to typing caused a regression while
generating FunctionCallContent for an AzureAIAgent. Fixing to use the
correct instance check.

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### Description

Adds integration tests for AzureAIAgent and OpenAIAssistantAgent.
- Fixes microsoft#11393
- Bump version to 1.27.2 for bug fix release.
- Remove unnecessary yield for function result content during streaming
invocation - these types will be added if the `on_intermediate_message`
callback is provided.

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### Contribution Checklist

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- [X] The code builds clean without any errors or warnings
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raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄

Python: Updates (microsoft#11371)

### Motivation and Context

Some code cleanup. 

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### Description

Some code cleanup. 

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### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [X] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
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raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄

Python: Bump Python version to 1.27.0 for a release. (microsoft#11358)

### Motivation and Context

Bump Python version to 1.27.0 for a release.

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### Description

Bump Python version to 1.27.0 for a release.

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### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [X] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄