[DOCS] Add **kwargs param description for models

[ArtemLiA]

📖 Documentation improvement

Hi! Looking through the documentation of some models, I noticed that some of them don't have a description of **kwargs parameters. I think we should fix it.

A list of models that don't have **kwargs argument description:

• CatBoostMultiSegmentModel (docs link)
• CatBoostPerSegmentModel (docs link)
• ElasticMultiSegmentModel (docs link)
• ElasticPerSegmentModel (docs link)
• LinearMultiSegmentModel (docs link)
• LinearPerSegmentModel (docs link)

Additional context

No response

[d-a-bunin]

Usually, these kwargs mean that these additional parameters are added into the model constructor. It looks like a good idea to point this out in documentation.

And may be we should give a link to the place there user could see all the parameters. I don't think we should list all the possible parameters, because they could change in the future.

[ArtemLiA]

Yes, I meant that we should add a mention that these parameters are added into model constructor and add link to the models. So, I am going to do it.