[#8620] [Platform] [Backport-2.6] Reset the values on cancel.

[nishantSharma459]

Description:
Backup -> Edit configuration. I edited something in the AWS key but I clicked cancel, though the value is not saved, the values I edited are still showing up. Once I reload the page, the edited values are gone and original (saved) values are shown, which is correct. It's good to reload the original values if cancel clicked rather than showing the edited values.

Test Plan:

1. Click on config from the side nav.
2. Go to Backup-> AWS.
3. Create a new Backup config.
4. Hit the Edit configuration button.
5. Change some values and hit the Cancel button.

Check if it's restoring the original values or not.

[lgtm-com]

This pull request introduces 3 alerts when merging 4ab0e06 into 87d1d5c - view on LGTM.com

new alerts:

• 2 for Potentially inconsistent state update
• 1 for Unused or undefined state property

[lgtm-com]

This pull request introduces 4 alerts when merging 6383c5d into 8d85d99 - view on LGTM.com

new alerts:

• 3 for Potentially inconsistent state update
• 1 for Unused or undefined state property

[sshev]

LGTM