[2.4] Cleaning up XGBoost Log

[nvidianz]

Fixes FLARE-2048.

Description

Cleanup logs for XGBoost,

1. Print an error log for XGBoost errors and removed the double printing of stack traces.
2. Changed most ReliableMessage log to DEBUG level and just leaves one INFO level log per message.

Types of changes

• [x] Non-breaking change (fix or new feature that would not break existing functionality).
• [ ] Breaking change (fix or new feature that would cause existing functionality to change).
• [ ] New tests added to cover the changes.
• [ ] Quick tests passed locally by running ./runtest.sh.
• [ ] In-line docstrings updated.
• [ ] Documentation updated.

[YuanTingHsieh]

/build

[YuanTingHsieh]

/build