Add support of iterable objects in estimator api

[liuzh47]

Description

fit() and evaluate() methods of the base Estimator class support inputs from iterable Object.

Fix #17124

Checklist

Essentials

• [ ] Changes are complete (i.e. I finished coding on this PR)
• [ ] All changes have test coverage:
• [ ] Code is well-documented:
• For user-facing API changes, API doc string has been updated.