ci: added release job for test build
Summary
This MR added a job related to creating the release for /e/ OS test build so that app lounge can receive update for /e/OS Calendar app.
Technical details
create-json-files and generate-apks, these 2 job are modified to generate an apk signed with test key and JSON file for /e/ OS test build. A new job create-test-release is added, which will create a release with this signed apk and JSON file.