Resolve "gitlab-foss master broken Karma: Issue card component"

What does this MR do?

Fixes master:broken introduced in 6c9fb393

• Moves issue weight=0 specs to ee
• Reinstates test to check that weight component does not render for gitlab-foss

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Performance and Testing

Tested locally on gitlab and gitlab-foss

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

Closes #33110 (closed)