Admin controller product set save refactor

[AnshuMishra17]

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
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[hitesh-wagento]

Hi @ihor-sviziev

Can I create Forwardport and Backport again for this PR ?

[ihor-sviziev]

Hi @hitesh-wagento,
Let's wait when this PR will be merged, also author might want to do it himself

[magento-engcom-team]

Hi @ihor-sviziev, thank you for the review.
ENGCOM-2093 has been created to process this Pull Request

[magento-engcom-team]

Hi @AnshuMishra17. Thank you for your contribution.
The changes from your Pull Request should be available with the upcoming 2.2.6 release.
Please check the release notes for final confirmation.

Please, consider to port this solution to 2.3 release line.
You may use Porting tool to port commits automatically.