Blender Git Loki

Created a script for running blend file with pre-loaded modifier

Added a loop to add each category geo_node tests

Each geometry node test is an individual test. It can be run
separately by ctest command. For example ctest -R geo_node_mesh
This will run all mesh tests.

The extra overhead is each test adds to the total tests.

Updated the script, adding support for cmd arguments

Added exception errors for try except, formatting, adding comments
Improved the workflow, updated error messages. Re-running of the
test after BLENDER_TEST_UPDATE.

Merge branch 'geo-node-testing' into soc-2021-geometry-nodes-regression-test

Differential Revision: https://developer.blender.org/D11611