[UI] Rollback pipeline delete if error

[jmar910]

Description

We don't explicitly catch on pipeline destroy when the API errors, so the pipeline itself was going into a deleted state and was causing issues with ember refetching the model. Now we catch on pipeline destroy and do a rollback, which appropriately resets the state.

Fixes https://github.com/ConduitIO/conduit/issues/592

Quick checks:

• [x] I have followed the Code Guidelines.
• [x] There is no other pull request for the same update/change.
• [x] I have written unit tests.
• [x] I have made sure that the PR is of reasonable size and can be easily reviewed.

[github-actions[bot]]

UI test coverage: 76.2%

:rotating_light: Decreased by -0.23% (was 76.43%)

[github-actions[bot]]

UI test coverage: 77.08%

:tada: Increased by +0.65% (was 76.43%)

[github-actions[bot]]

UI test coverage: 77.08%

:tada: Increased by +0.65% (was 76.43%)