Incremental builds don't work with --remote-build

[nmalcolm]

Describe the Issue:

$ doctl serverless deploy . --remote-build --incremental
Deploying '/Users/nathan/project'
  to namespace 'fn-...'
  on host 'https://faas-syd1-c274eac6.doserverless.co'
Error: Cannot read properties of undefined (reading 'packageVersions')

Environment:

• doctl version: doctl version 1.104.0-release
• OS: macOS Sonoma
• Installation method: Github release

Additional Details:

I'm not sure if incremental builds are supposed to work with remote builds, but that would save a lot of time, especially when deploying functions across multiple regions.