Backport to branch(3) : Add RBAC APIs

[feeblefakie]

This is an automated backport of the following:

• Original PR: Add RBAC APIs #3083
• Backported commit: 69a70fa

Please merge this PR after all checks have passed.

[gemini-code-assist]

Summary of Changes

Hello @feeblefakie, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This backport introduces a significant expansion of the authentication and authorization capabilities by adding a full suite of Role-Based Access Control (RBAC) APIs. These new APIs enable granular control over user permissions through roles, allowing for the creation, management, and assignment of roles, as well as the definition of privileges associated with those roles. This enhancement provides a more robust and flexible security model for the system.

Highlights

• RBAC API Expansion: A comprehensive set of new default methods has been introduced in the AuthAdmin interface to manage Role-Based Access Control (RBAC). These methods cover role creation, deletion, user-role assignments, role hierarchies, and privilege management at both namespace and table levels.
• New RBAC Data Structures: Several new interfaces, including Role, RoleDetail, UserRoleDetail, UserRole, and RoleHierarchy, have been added to model the various components and relationships within the new RBAC system.
• Decorator Implementation: The DecoratedDistributedTransactionAdmin class has been updated to implement all the newly added RBAC API methods, delegating their calls to an internal distributedTransactionAdmin instance, thus maintaining the decorator pattern for these new functionalities.

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[gemini-code-assist]

Code Review

This pull request backports the addition of Role-Based Access Control (RBAC) APIs. The changes introduce new methods to the AuthAdmin interface for managing roles, role grants, and privileges, along with corresponding implementations in the decorator class. My review focuses on improving the clarity and precision of the Javadoc for the new API methods and interfaces to enhance maintainability. I've suggested a few documentation updates to prevent potential ambiguity.