Avoid matching on type name in client_generation module of Rust SDK for `Principal`

[afsalthaj]

Unlike TS SDK, this name matching happens only at the client generation side just to avoid those principal principal parameters in the generated client. This ticket is similar to #2829

There are many ways to do this such as Schema typeclass holding isPrincipal etc.

[afsalthaj]

Is this fixed @mschuwalow ? If not could you assign it yourself?