feat(experiments): add the ability to view an experiment's traces (#3603)

* feat(experiments): add the ability to view an experiment's traces

* rename

* fix type

* fix

* Update src/phoenix/server/api/dataloaders/project_by_name.py

Co-authored-by: Xander Song <axiomofjoy@gmail.com>

* final changes

* lint

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Co-authored-by: Xander Song <axiomofjoy@gmail.com>