Python: Add cross language tests

[moonbox3]

Motivation and Context

As we move towards v1 and beyond it's essential that we have a way to make sure we are staying in line with the other SK SDKs. Previous to this we didn't have a way to capture request bodies and payloads and make sure they confirm to the proper SK standards.

Description

This PR introduces a number of integration tests that exercise various aspects of the SK SDK like prompts, prompt templates, functions, and the kernel.

TODO: update the OpenAPI tests with a more JSON specific response that we can check against.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

Python 3.10 Test Coverage Report •

File	Stmts	Miss	Cover	Missing
semantic_kernel/connectors/ai/open_ai/services
open_ai_chat_completion_base.py	212	93	56%	98, 118, 143–147, 171, 175, 191–196, 213–241, 244–255, 273–280, 291–299, 315–322, 343, 351, 357–363, 375–381, 412, 451, 453–454, 459–464, 468–475, 497, 506–515
TOTAL	6246	963	85%

Python 3.10 Unit Test Overview

Tests	Skipped	Failures	Errors	Time
1350	1 💤	0 ❌	0 🔥	15.275s ⏱️

[eavanvalkenburg]

some small nits, but should be ok