fix(publish): support inconsistent workspace prefix usage

[fahslaj]

Adds a guard to prevent interpreting all local dependencies as workspace links when a single workspace link is detected.

Motivation and Context

#3412

Lerna was assuming that if any one package is linked with the workspace: prefix, then all packages in the workspace are linked that way. This change allows workspaces to be more flexible and iterative when adopting the workspace: prefix standard. After this PR, lerna publish will no longer break when publishing a package with inconsistent usage of the workspace prefix for linking local dependencies.

How Has This Been Tested?

This has been tested manually and covered by an e2e test.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (change that has absolutely no effect on users)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.