Fixed MeasureSamplesPerSecondCallback and changed configs

[3rdCore]

Hello everyone,

Here's a small Pull Request that features 2 small modifications:

• I fixed the function get_num_samples of the callback MeasureSamplesPerSecondCallback that used to raise an error when working with batch as dict object when value referred to scalar, which can happen for instance when doing boolean regression or if target is, for some reasons, not one-hot encoded.
• I added an entity attribute to be able to log into project that are own by a Wandb organisation (e.g. Mila).

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.13%. Comparing base (d37d4c3) to head (02d740e).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #138   +/-   ##
=======================================
  Coverage   72.13%   72.13%           
=======================================
  Files          50       50           
  Lines        3890     3890           
=======================================
  Hits         2806     2806           
  Misses       1084     1084           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.