solana: Warn when the upgrade authority is not revoked following deployment

[johnsaigle]

Some NTT implementations may wish to make the program immutable, for example in the case of a governance program that itself can update an NTT deployment.

To do this, the upgrade authority of the Solana contract should be revoked (set to None).

The configuration-verification tooling should warn when that he upgrade authority should be revoked. If an integrator wants a mutable program, they can ignore the warning.