Heldimage + MEstimation tests for jigsaw (#4099)

* jigsaw to app conversion and remove unnecessary tests

* Updated based on comments

* Updated spacing

* Adds apollo fixture for jigsaw tests

* Updated to use pvl control network

* added error tests

* started new test

* first take

* finished mestrimator test

* removed things

* more merge conflicts

Co-authored-by: Kristin <kberry@usgs.gov>