chore: Remove 4 redundant Meta Llama integration tests

[vblagoje]

Why:

Reduces number of LLMs calls for meta_llama integration tests by removing 4 redundant tests that duplicate functionality already covered by other integration tests. This should hopefully stop CI rate limit failures we get from Meta.

What:

• Removed test_live_run_async - duplicates basic async functionality covered by other async tests
• Removed test_live_run_with_response_format_json_schema - redundant with Pydantic response format test
• Removed test_live_run_with_tools - subset of test_live_run_with_tools_and_response
• Removed test_live_run_with_tools_streaming_async - duplicates sync version and other async tool tests

How can it be used:

N/A

How did you test it:

• Verified remaining tests still provide comprehensive coverage
• Confirmed no functionality gaps in test suite
• All removed tests were validated as redundant with existing coverage

Notes for the reviewer:

This is a straightforward cleanup - each removed test's functionality is still covered by one or more remaining tests. The reduction in test count (14 → 10) maintains quality while improving CI efficiency.

[vblagoje]

@mpangrazzi this is hopefully a fix for our rate limiting CI Meta Llama failures. Let's remove 4 redundant integration tests and see if we don't get rate limited as often

[mpangrazzi]

👍