Display clearer permission error messages when users lack access in Xray

Description
When users try to access or configure certain Xray areas(Xray Space Settings, Testing Board) without the required permissions, only a generic error message is displayed. 

User friction
Users do not understand why the action failed, as the error is too generic. This can cause users to think there is a system issue.

Steps to reproduce (right now) / Actual Result:
1. Open a Testing Board in a project where the user has no browse permissions.
2. A generic error is displayed, such as "Something went wrong on our end"

IMPACT

What would improve if solved:
Users will receive a clearer message on why the action failed and will be able to troubleshoot on their end. 

Impact on stakeholders:
Users will have clearer guidance on what permissions are needed. 

Current workaround:
Users need to troubleshoot on their end or open a support ticket.

CONTEXT & EXAMPLES:

Concrete examples:
A user tries to configure Xray settings with no admin permissions.
A user opens a project with no Testing Board

Workaround risk:
Takes time to investigate the cause of the error.