After #2364, we have these constants defined in four places in miden-standards:

const AUTH_UNAUTHORIZED_EVENT = event("miden::protocol::auth::unauthorized")
const AUTH_REQUEST_EVENT = event("miden::protocol::auth::request")

Since we can now make constants public, we should define these in miden::protocol::auth.

To do this we can:

• Add a new module crates/miden-protocol/asm/protocol/auth.masm.
• Define these constants as pub const.
• Replace the four occurrences in miden::standards (e.g. in crates/miden-standards/asm/account_components/auth/ecdsa_k256_keccak_multisig.masm) with imports of the constants.
• And remove the custom handling of these events in build.rs:
  https://github.com/0xMiden/miden-base/blob/72f5fc670b9d6b8492c18c703c81127416e81dff/crates/miden-protocol/build.rs#L426-L429

Context: #2364 (comment)