OPIK-52 Add trace usage search

[andrescrz]

Details

Added support to search by trace usage: completion_tokens, prompt_tokens and total_tokens.
Behaviour is exactly the same as for span usage.
Since trace usage field is a calculated field instead of a normal field, I had to extend the query builder engine to support this use case.

Issues

OPIK-52

Testing

• Added integration tests covering all the cases:
  • Covering the three usage tokens: completion_tokens, prompt_tokens and total_tokens.
  • All operations that apply: equals, greater than, greater equals than, lower than and lower equals than.

Documentation

• N/A

[thiagohora]

LGTM!