fix(run): detect target configuration in package.json files

[fahslaj]

Detect custom, package-specific Nx configuration in package.json files.

Description

Updates Lerna run to consider Nx configuration within package.json files when determining whether or not to tell Nx mimic Lerna default behavior regarding including project dependencies in running tasks.

Motivation and Context

#3407

How Has This Been Tested?

An e2e test has been added to cover this case. This has also been tested manually.

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.