validate does not install transitive dependencies in individual mode

[dschibster]

Describe the bug
When shrinking dependencies in the sfdx-project.json to get rid of transitive dependencies, sfp validate pool --mode=individual does not install those transitive dependencies, althrough they are properly explained before the validation process starts

To Reproduce
Steps to reproduce the behavior:

• Create multiple org-dependent packages in one Dev Hub
• Have one of them (pk2) be dependent on another (pk1)
• Have a second one be dependent on the one you made dependent in step 2 (pk3)
• Start a validation with individual mode

Expected behavior
If a change occurs in pk3 only, it should install pk1 and then pk2, because of the way dependencies are inherited.

Screenshots

Explained the right dependencies

Did not install them

Platform Details (please complete the following information):

• OS: Ubuntu VM
• Version [e.g. CLI Version eg: 1.6.6] sfp community latest
• Salesforce CLI(sfdx cli) Version: latest
• CI Platform: Azure Devops

Additional comments
Workaround is to call sfp dependency expand before sfp validate in the pipeline, but this is probably not how this is supposed to work