[Fleet]: Spaces which are not accessible is displayed a "?" under Agent policy settings for custom user having access only for Space2.

[amolnater-qasource]

Kibana Build details:

VERSION: 8.16.0 SNAPSHOT
BUILD: 78483
COMMIT: 6a9663fa3a874877f0ca034970e72af8ab70be66

Role: space: SPACE2

Integrations: All
Fleet: Read
Agents: Read
Agent policies: All
Settings: All

Preconditions:

1. 8.16.0-SNAPSHOT Kibana cloud environment should be available.
2. New User should be created with above defined role.
3. An agent policy should be provided access to all the spaces.

Steps to reproduce:

1. Login with the above user to the second space.
2. Now navigate to Fleet>Agent policy settings.
3. Observe the spaces that are not accessible to this user are displayed as ?.

Expected Result: Spaces which are not accessible should not be displayed even as ? under Agent policy settings for custom user having access only for Space2.

Screen Recording:

https://github.com/user-attachments/assets/6bee6d45-5047-4a85-a5bf-b2ce096684f5

Feature: https://github.com/elastic/ingest-dev/issues/2903 https://github.com/elastic/ingest-dev/issues/1664

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[amolnater-qasource]

@muskangulati-qasource Please review.

[muskangulati-qasource]

Secondary review on this ticket is Done