Python: Remove model info check in Bedrock connectors

[TaoChenOSU]

Motivation and Context

Closing #10941

Description

To support more ways (via model_id, inference_profile, or model arn) to send requests to Bedrock models, we have removed the checks on whether a model supports certain features, i.e. streaming and embedding generation. This is because to check for if a model support certain features, we need the model id, but given the flexibility in specifying the target model, it's no longer possible to retrieve the model information realiably.

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 Test Coverage Report •

File	Stmts	Miss	Cover	Missing
connectors/ai/bedrock/services
bedrock_base.py	10	0	100%
bedrock_chat_completion.py	132	14	89%	113, 130, 155, 159–162, 220, 238–239, 246–247, 255, 314
bedrock_text_completion.py	53	2	96%	94, 112
bedrock_text_embedding.py	39	1	97%	86
TOTAL	27090	4619	82%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3620	22 💤	0 ❌	0 🔥	1m 53s ⏱️