Redirect to the referrer when updating a service

What does this MR do?

Until now it was ok that after an external service update we redirected back to the integration settings page.

Now we have another page from where we can directly configure integration setting (Jira import). In that case we want to redirect back to that page.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.

Issue #215539 (closed)