Add `params_to_tune` into `Tune.__init__`

[Mr-Geekman]

🚀 Feature Request

We should add possibility to set custom params_to_tune for a given pipeline.

Proposal

Add params_to_tune into Tune.__init__. It it isn't set pipeline.params_to_tune is used like it is implemented now.

Test cases

• Add test_tune_custom_run where we set params_to_tune manually
  • We can check that there are expected classes in a summary

Additional context

Blocked by #1269.

[Mr-Geekman]

Closed by #1282.