## Description
Observation: Even after successful execution of the migration where we
are replacing policies to policyMap for tenant, we end up in a state
where the policies has the required values but policyMap was still end
up in a empty state.
```
{
policyMap: {},
policies: [
{
permission: 'tenantReadPermissionGroups:tenant',
permissionGroups: [ '6303edf184daf727dddb003d' ]
},
{
permission: 'tenantManageUserGroups:tenant',
permissionGroups: [ '6303edf184daf727dddb003d' ]
},
{
permission: 'tenantDeleteUserGroups:tenant',
permissionGroups: [ '6303edf184daf727dddb003d' ]
},
.
.
.
}
```
/test sanity
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!TIP]
> 🟢🟢🟢 All cypress tests have passed! 🎉🎉🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/10348884858>
> Commit: 539a7675d780abebdb6ad8b90f2d8d2923374bb3
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=10348884858&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Mon, 12 Aug 2024 09:16:31 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Improved tenant management and cache eviction processes during
migrations to ensure accurate and up-to-date tenant information.
- **Bug Fixes**
- Enhanced data consistency and integrity by evicting the default tenant
from the cache after updates, preventing stale data issues.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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