[Backport] Fixed redirection issue in Admin-> Content -> Schedule

[mage2pratik]

Original Pull Request

#20967

Description (*)

Redirection issue when saving the Content -> Schedule. If an error occurs then always redirect to the grid section

Manual testing scenarios (*)

#1 - Goto Content -> Schedule -> Add Design Change
#2 - Create record with wrong data(wrong date range) and save

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @mage2pratik. Thank you for your contribution
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[magento-engcom-team]

Hi @sidolov, thank you for the review.
ENGCOM-4235 has been created to process this Pull Request

[ghost]

Hi @mage2pratik, thank you for your contribution!
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