Time limited licenses for community members to work on EE features

Problem

Community members are currently not able to work on EE Issues labelled "Accepting merge requests" as they don't have access to an EE license. A community member raised this problem in the GDK Issue tracker.

Proposal

Offer minimal, time limited EE licenses for community members who wish to work on such Issues.

How will we measure success?

Community members are able to create mergeble MRs for EE Issues labelled "Accepting merge requests".

cc @kwiebers