refactor(core): use workspace role query instead of isOwner query (#12118)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **Refactor**
  - Updated workspace permission handling to use a unified role field within workspace data instead of separate admin and owner flags.
  - Permission checks now rely on the workspace role for determining admin and owner status.
- **Chores**
  - Removed deprecated queries and types related to admin and owner status.
  - Cleaned up internal logic and variable naming for improved consistency.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/modules/permissions/entities/permission.ts

@@ -1,3 +1,4 @@
+import { Permission } from '@affine/graphql';
 import {
   backoffRetry,
   effect,
@@ -43,8 +44,8 @@ export class WorkspacePermission extends Entity {
           );
 
           return {
-            isOwner: info.isOwner,
-            isAdmin: info.isAdmin,
+            isOwner: info.workspace.role === Permission.Owner,
+            isAdmin: info.workspace.role === Permission.Admin,
             isTeam: info.workspace.team,
           };
         } else {