Exclude projects marked for deletion when parent is marked for deletion from Projects List API

Problem to solve

When getting projects via the Projects API, exclude projects marked for deletion and exclude projects if a parent group is marked for deletion.

Intended users

Developers

Proposal

Speedup retrieval of projects.

Further details

Add a parameter with_deleted to the List all projects API

Documentation

https://docs.gitlab.com/ee/api/projects.html#list-all-projects