DOC: Clear some warnings for daal4py doc builds

Description

This PR resolves many warnings that pop out when building the daal4py docs and which prevent the CI jobs from building those docs correctly.

Note that it doesn't solve all of the warnings - after this PR, one would still see many of these cases:

scikit-learn-intelex/doc/daal4py/docstring of daal4py._daal4py.classifier_prediction_result:1: WARNING: duplicate object description of daal4py.classifier_prediction_result, other instance in algorithms, use :noindex: for one of them

(I'm not sure what to do about those)

PR should start as a draft, then move to ready for review state after CI is passed and all applicable checkboxes are closed. This approach ensures that reviewers don't spend extra time asking for regular requirements.

You can remove a checkbox as not applicable only if it doesn't relate to this PR in any way. For example, PR with docs update doesn't require checkboxes for performance while PR with any change in actual code should have checkboxes and justify how this code change is expected to affect performance (or justification should be self-evident).

Checklist to comply with before moving PR from draft:

PR completeness and readability

[x] I have reviewed my changes thoroughly before submitting this pull request.
[x] Git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details).
[x] I have added a respective label(s) to PR if I have a permission for that.
[x] I have resolved any merge conflicts that might occur with the base branch.

Testing

[x] I have run it locally and tested the changes extensively.
[ ] All CI jobs are green or I have provided justification why they aren't.

Performance

Not applicable.

uxlfoundation / scikit-learn-intelex

DOC: Clear some warnings for daal4py doc builds #2205

Description