Allow the use of scratch orgs configured to behave as non-scratch orgs for metadata format projects

[Scott Wells]

This was requested by a user to help during a transition of a large project to scratch orgs. With the recent enhancement to designate a scratch org as having non-scratch org deployment/retrieval/delete behavior, it should all really be there except for an artificial filter for metadata format projects.

[Scott Wells]

This build should do it. Please try it out and let me know if there are any issues. I'll keep testing and if all looks good will include it in the next-next release.

[Scott Wells]

This was delivered a build or two back.