Minor code readability improvements discovered on code review.

[sgpinkus]

Description: Minor code readability improvements discovered on code review.

• Rename (Pipenv|Poetry)Cache "patterns" field to "cacheDependencyPath" to be consistent with PipCache, base class, and cache-factory.ts
• Rm CacheDistributor.cacheDependencyPath field and pass back from computeKeys instead, simplifying CacheDistributor.restoreCache error check. Rm now not needed constant.ts.

Related issue:

Check list:

• [ ] Mark if documentation changes are required.
• [ ] Mark if tests were added or updated to cover the changes.