fix(tools): normalize tuple schemas for Gemini API

[EaCognitive]

Re-opening my fix for #5428 since the original issue was closed due to inactivity from the reporter.

My previous PR (#5446) accidentally included broken cli and noxfile.py files which caused the CI failures. This is a clean submission containing ONLY the strip-based workaround verified to fix the Cloud Run deployment issues.

Testing Plan

• Mypy-diff verified clean against main.
• pre-commit run --all-files passes format and license checks.
• Added 4 explicit unit tests in tests/unittests/tools/test_function_parameter_parse_util.py to verify prefixItems and unevaluatedItems are successfully recursively stripped.
• Multi-version tests (Python 3.10-3.14) pass successfully.

Logs

$ pytest tests/unittests/tools/test_function_parameter_parse_util.py
============================= test session starts ==============================
platform darwin -- Python 3.11.15, pytest-9.0.3, pluggy-1.6.0
collected 4 items

tests/unittests/tools/test_function_parameter_parse_util.py ....         [100%]

============================== 4 passed in 0.05s ===============================

cc @surajksharma07 @rohityan

[adk-bot]

Response from ADK Triaging Agent

Hello @EaCognitive, thank you for reopening this clean PR to fix the Cloud Run deployment issue #5428!

While reviewing your PR against our contribution guidelines, we noticed a few items that could be added or updated to help speed up the review:

1. Testing Plan: Please include a designated testing plan section in your PR description detailing how the changes are verified.
2. Logs or Screenshots: For bug fixes, please provide logs or screenshots showcasing the output or verified fix to help reviewers understand the changes better.
3. CI Status / Header Check: The CI run shows that the header-check status check has failed. Please verify that all files conform to the license header requirements. You can run the auto-formatter/linter locally using pre-commit run --all-files to automatically apply the license headers and resolve format checks.

This information will help our reviewers review your PR more efficiently. Thanks again for your contribution!

[sasha-gitg]

We switched to Gemini JSON schema by default so I don't think this PR is necessary because from_function_with_options is bypassed.