Fix 'Open in your IDE' buttons don’t open the IDE

What does this MR do?

This MR fixes a regression where the new 'Open in your IDE' buttons don’t open VS Code.

The bug is caused by a problem during rebasing (my fault 👋 sorry!) the branch that introduced this change (see !49460 (merged)). After clicking on the button, an event is dispatched. The default event behavior, i.e. opening the associated link, is prevented by default. We want this behavior for the 'Open in your IDE' button though. During rebasing, the original prevent statement slipped back into the code, leading to the button to never open the IDE.

Related to #220957 (closed)

Screenshots (strongly suggested)

1. Go to a project
2. Click on the “Clone” dropdown
3. In the “Open in your IDE” section, click on “Visual Studio Code”

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.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team