Allow backwards recursive artifact definition for Pipelines

Let's suppose we have a directory tree that looks like this in this case:

#!bash

a
|
-test
  |
  -test1.txt
|
b
|
-test
  |
  -test2.txt
|
test
|
-test3.txt

On Pipelines, it's possible to define recursive artifacts for folders below the specified folder using glob patterns like this:

#!bash

artifacts:
  - test/**

On our directory tree above, this would only fetch the "test3.txt"file

However, it's not possible to use a glob pattern to fetch every folder with the same name under every existing folder recursively, like this:

#!bash

artifacts:
  - **/test

^The validator does not allow a definition like this. In this case, the desired behavior would be to fetch the test1.txt and test2.txt files without having to manually define the artifacts like this:

#!bash

artifacts:
  - a/**
  - b/**