The ByteBufferBsonOutputTest and related tests currently take ~12 minutes to run locally due to Unicode code point coverage and produce non-human-readable test names in Evergreen.

To improve developer experience:

• Limit tested Unicode code points to a representative subset (e.g., every 10th or 20th point) across both input/output tests, similar to existing logic in ByteBufferBsonInputTest.

• Ensure all test names appear clearly in IntelliJ and Evergreen.

• Investigate possibility of relocating full Unicode coverage to a slow-test task that runs periodically (e.g., mainline only).