Expose `emit` instruction on the Rust side

[greenhat]

We need it for the authentication AccountComponent #660 where it's used at https://github.com/0xMiden/miden-base/blob/e4912663276ab8eebb24b84d318417cb4ea0bba3/crates/miden-lib/asm/miden/auth/rpo_falcon512.masm?plain=1#L62 to emit the event that pushes a signature for the message to the advice provider.

Use the new emit op that takes the value from the stack. It was added in 0xMiden/miden-vm#2083

[greenhat]

@bitwalker @bobbinth The 0xMiden/miden-vm#2083 seems to be included in the upcoming VM v0.18. Do we want to have a quick and dirty workaround in the meantime or do we want to wait for v0.18? The workaround could be in the form of a compiler intrinsic surfaced on the Rust side as a emit_auth_request() function.

[bobbinth]

I think waiting for v0.18 VM is probably fine. I'm hoping to have the VM itself released this week, and it should be propagated through the miden-base and miden-client some time next week.