Failure during deploy (left to right deployments) makes next deployments incomplete

[ihorleleka]

Issue description

In specific situations when an attempted deployment failed during schema migration steps deploy gets into state where code updates were not yet promoted to target env, however they are already "built" on source.

So if you try to re-start deployment without any changes it can succeed, but in fact no code will be deployed, as system will skip it (it won't find any changes in code, as it was built and marked handled by previous failed run).

I'd suggest all failed deployments to either create a raw market which would force both code and schemas deployment OR introduce an option on umbraco cloud to force it manually.