Remove temporary SBOM permission override in ArtifactListPageService

[rakshityadav1868]

Description

In artifact-list-page.service.ts, _hasSbomPermission is already populated using the result returned from:

hasProjectPermissions(projectId, permissions)

However, the value is immediately overridden by a hardcoded assignment:

this._hasSbomPermission = true;

This bypasses the actual permission check and always enables SBOM permission in the UI regardless of the user's real project permissions.

Expected Behavior

• SBOM permission should rely only on the result returned from hasProjectPermissions(...)

• Users without SBOM permission should not receive access through the UI

• The temporary hardcoded override should be removed

Possible Fix

Remove:

this._hasSbomPermission = true;

and verify the permission flow with different project roles/users.

[wy65701436]

@bupd can you help to take a look?