Fix heavy tests failures

[aozherelyeva]

Motivation and Context

1. Exclude Bedrock Claude Haiku model due to guardrail issues in executor tests.
2. Update OpenAIFunction to default arguments to an empty string.
3. Expand ReasoningEffort with "none" level, update serialization accordingly.
4. Add handling for OpenAI image download errors in retry utility.

Breaking Changes

None.

---

Type of the changes

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Tests improvement
• Refactoring

Checklist

• The pull request has a description of the proposed change
• I read the Contributing Guidelines before opening the pull request
• The pull request uses develop as the base branch
• Tests for the changes have been added
• All new and existing tests passed

Additional steps for pull requests adding a new feature

• An issue describing the proposed change exists
• The pull request includes a link to the issue
• The change was discussed and approved in the issue
• Docs have been added / updated

[github-actions]

Qodana for JVM

1191 new problems were found

Inspection name	Severity	Problems
Check Kotlin and Java source code coverage	🔶 Warning	1180
Missing KDoc for public API declaration	🔶 Warning	11

@@ Code coverage @@
+ 71% total lines covered
16418 lines analyzed, 11797 lines covered
# Calculated according to the filters of your coverage tool

☁️ View the detailed Qodana report

Contact Qodana team

Contact us at qodana-support@jetbrains.com

• Or via our issue tracker: https://jb.gg/qodana-issue
• Or share your feedback: https://jb.gg/qodana-discussions

[kpavlov]

Thank you so much 😊