Remove unconditional, uncontrollable output statements

[Paul Prescod]

❗BEFORE YOU BEGIN❗

Is your feature request related to a problem? Please describe.

I'm embedding your evaluate function in a program and it outputs stuff like this:

✅ Tests finished! Run "deepeval login" to view evaluation results on the web.'

Describe the solution you'd like
It should not output text unless print_results is True

Deepeval 0.21.42