Add a caching layer for role management

[AnuradhaSK]

Describe the Improvement:

• A new service has been introduced for role management as RoleManagerV2
• To improve the performance of the service, a caching layer is required.

[dewniMW]

Adding a caching layer must be done carefully as the role has dependencies with other components such as groups, users, IdPs, applications, API resources and permissions. The cache invalidation must be handled based on any modifications for these components.
Therefore we initially decided to analyze the possibility of cache permissions against a role. Upon further analysis, there is an issue with invalidating cache when an API resource gets deleted, which has been handled as a cascade delete at db level. Hence there are complexities with invalidating the cache.

[isharak]

This issue is being closed due to extended inactivity. Please feel free to reopen it if further attention is needed. Thank you for helping us keep the issue list relevant and focused!