Add support to run multiple correspondence generator before 2-view estimation

[ayushbaid]

[ayushbaid]

Metrics on 01/02: visual_comparison_dashboard.zip

[travisdriver]

Some unit tests failing to do FAILED tests/test_gtsfm_runner_olssonloader.py::test_gtsfm_runner_olssonloader[dataset_path0] - hydra.errors.MissingConfigException: Cannot find primary config 'sift_front_end.yaml'. Check that it's in your config search path.

[travisdriver]

It looks like you deleted a couple of the front-end configs. Did you mean to do that?

[ayushbaid]

It looks like you deleted a couple of the front-end configs. Did you mean to do that?

I thought everything used unified, but apparently not. Let me revert.

[johnwlambert]

CI is failing btw