disable lockfile when verifying fuel-core during publishing

Since our crates aren't published with a lockfile, we should verify all our crates can build without a lockfile during a release before any artifacts get uploaded. This will help prevent partially successful releases where some crates get uploaded and some don't due to breaking patches in dependencies.

Deliverables:
- Include new CI check that tries to build without lockfile. This can be run every time we are merging into`master` so when we do a release it is most-likely gonna work. (maybe use `cargo make check`?)