[Feature]: Support $CustomPath in Evergreen Libraries

[ahambidg]

What is your feature request?

It would be awesome if the Evergreen Libraries could support the $CustomPath parameter for Save-EvergreenApp.

Have you tested against the current version?

• [X] Yes, I've updated Evergreen and tested against the current version.

Have you reviewed the documentation?

• [X] Documentation at: https://stealthpuppy.com/evergreen/

[aaronparker]

What's the directory structure you might end up within the library?

[ahambidg]

So in my specific situation we're using Evergreen to simply download the executables of the apps we want for the image for our build servers. In this specific instance we're not looking to build a library but instead utilize the library function, with the associated json, to give us a version controlled way to handle that without going through a foreach loop. It's purely convenience.