Fix create merge request from vuln modal regression

Merged Fernando requested to merge fix-broken-create-mr-from-vuln-modal into master

What does this MR do?

Looks like this shipped in 11.11

https://gitlab.com/gitlab-org/gitlab-ee/issues/11807 Fixes broken create merge request button in the vuln modal when used from the project and security group dashboards

Does this MR meet the acceptance criteria?

Conformity

Performance and testing

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
Edited by Fernando