Add ProcMarker decorator

[tohrnii]

This PR adds ProcMarker decorator to executing programs that helps adding context to running programs about whether an operation is part of a procedure. A procedure stack of currently executing procedures is added to the VmState. Edit: Also removes AsmOp decorator for advice injection operations.

[grjte]

Just a note that this work is on hold pending the updates to the SYSCALL operation which will cause changes in the decoder, issue #418