feat(jans-cedarling): Implement check authorization principals based on the schema for action

[olehbozhok]

Is your feature request related to a problem? Please describe.
In cedar-policy schema from agama-lab we have 3 principals Workload, User and Role
Currently, for each request we make authorization check for each principal.

And it is hard coded that each principal use namespace "Jans"

Describe the solution you'd like

• improve parsing cedar-policy schema and add check if principal can be applied to cedar-policy Action
• add usage of namespace stored in the policy-store

Additional context
In policy store field name describe namespace in the cedar-policy schema

[nynymike]

Rather then making three authz requests, which may have three different diagnostics, is it possible to combine these three queries into one authz request?

[olehbozhok]

@nynymike agama-lab already implemented creating cedar-policy schema with 3 possible principals.
To make all checks in one, we need to figure out possible solutions. But looks like we need to implement a principal entity that can hold values of all current principals.

I think it is a huge change and may have impact on demo deadline.