* [OPIK-402]: handle project name and score definitions for evaluate();

* [OPIK-402]: linter;

* [OPIK-402]: remove the default value for log_scores project_name

* [OPIK-402]: run linter;

* Introduce a evaluate_existing method

* Add proper support for project_name

* Add proper support for project_name

* Update following code review

* Update following code review

* Update following code review

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Co-authored-by: Sasha <aliaksandr@comet.com>