[Bug - Partner Center] Ability to restart review process for extension updates without making any change to extension package

[sonakshimore]

Describe the bug
Currently, if an extension review fails certification due to testing credentials not being provided, to restart the review process, we must make changes to the extension details and extension package.

To Reproduce
Steps to reproduce the behaviour:

1. Go to 'Packages' on Partner Center
2. Click on 'Continue' to proceed with the existing extension package
3. Click on 'Save and continue' on the 'Availability' and 'Properties' pages
4. Click on 'Publish' on the 'Store Listings' page
5. See error Can't publish extension as your extension has not been modified since last publish.

Expected behaviour
Ideally, the error message should not appear as the extension package and information provided is correct.

Screenshots
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