Use aws_cryptosdk_edk_list_is_bounded predicate in proof harnesses

There are proof harnesses that could benefit from the predicate, so we need to track and update them.

Search the repository for aws_cryptosdk_edk_list_is_bounded and identify the proof harnesses that currently lack the predicate. Read those harnesses and their existing verification commands first; done means the relevant harnesses use the predicate and continue to pass their proof checks.

Written by the indexing model from the issue text.