[Forwardport] Admin controller product set save refactor

[AnshuMishra17]

Original Pull Request

#16217
Description
Remove direct use of object manager for admin attribute set save controller using constructor based dependency injection.

Manual testing scenarios
Created a new attribute set in admin under Stores -> Attribute Set -> Add Attribute Set.
Edit an existing attribute set under Stores -> Attribute Set

[magento-engcom-team]

Hi @AnshuMishra17. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
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[magento-engcom-team]

Hi @AnshuMishra17. Thank you for your contribution.
We will aim to release these changes as part of 2.3.0.
Please check the release notes for final confirmation.