CircleCI config overhaul, instrumentation tests & screenshot automation (EXPOSUREAPP-4480,DEV) (#2160)

* CircleCI overhaul and execution of instrumentation tests.

* Screenshots work, now run for release builds only.

* Tweak emulator to possibly improve performance.

* Compress results.

* Don't upload test xml files if circle CI already shows them.
Zip and upload test html reports instead of xml files.

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>