test(litellm): make tool-call argument log tests independent of test order

[ankit2235]

Link to Issue or Description of Change

2. Or, if no issue exists, describe the change:

Problem:
Four tests in TestParseToolCallArguments (tests/unittests/models/test_litellm.py) fail depending on test order:

• test_repaired_arguments_log_debug_with_raw_payload
• test_repaired_arguments_without_function_name
• test_literal_eval_layer_logs_debug_not_warning
• test_literal_eval_without_function_name_logs_debug

They use caplog.at_level(logging.DEBUG), which only lowers the root logger. CLI tests call setup_adk_logger(), which sets the google_adk logger to INFO and leaves it there. When a CLI test runs earlier in the same process, logger.isEnabledFor(logging.DEBUG) in lite_llm.py is False, the DEBUG branch is skipped, and the assertions on the raw payload fail.

Reproduce on main:

pytest tests/unittests/cli tests/unittests/models/test_litellm.py::TestParseToolCallArguments -q
4 failed, 1448 passed, 5 skipped, 3 xfailed

Solution:
Set the level on the google_adk logger explicitly: caplog.at_level(logging.DEBUG, logger="google_adk"). This matches the fix already used elsewhere in the same file. Test-only change; no library code is modified.

Testing Plan

Unit Tests:

• I have added or updated unit tests for my change.
• All unit tests pass locally.

# Order-dependent reproduction, after the fix
pytest tests/unittests/cli tests/unittests/models/test_litellm.py::TestParseToolCallArguments -q
1452 passed, 5 skipped, 3 xfailed

# Whole file
pytest tests/unittests/models/test_litellm.py -q
566 passed

Note: on a full local run, test_gke_code_executor.py fails with kubernetes 37.0.0. That is unrelated to this change and tracked in #7443.

Manual End-to-End (E2E) Tests:

Not applicable: test-only change.

Checklist

• I have read the CONTRIBUTING.md document.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have manually tested my changes end-to-end.
• Any dependent changes have been merged and published in downstream modules.

[ankit2235]

This was fixed on main in eb53675, which scopes the same caplog calls (and the WARNING ones in this class) to the google_adk logger, so I'm closing this one. Thanks!