Hide Add Sketch option for non-owners of collections

[Riddh1ma]

Summary
Fixes #4148 by hiding the "Add Sketch" option in the collection dropdown for users who do not own the collection.

Changes

• Added the same ownership check used by Rename and Delete actions to the Add Sketch menu item.
• Non-owners no longer see the Add Sketch option in collection action menus.

Testing

• Verified collection owners can still access the Add Sketch option.
• Verified the Add Sketch menu item now respects the userIsOwner condition.

Fixes #4148

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• has no typecheck errors (npm run typecheck)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123
• meets the standards outlined in the accessibility guidelines