[WIP] Update regression tests for tutorials

[bigfooted]

Proposed Changes

Add regression test for 90 degree bend adjoint design tutorial

Related Work

Resolve any issues (bug fix or feature request), note any related PRs, or mention interactions with the work of others, if any.

PR Checklist

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[pcarruscag]

What I meant by testing one iteration was to test the entire optimization script by doing one iteration, not just test each call to SU2.
I guess we need to add FADO to the SU2 installation?

[bigfooted]

What I meant by testing one iteration was to test the entire optimization script by doing one iteration, not just test each call to SU2. I guess we need to add FADO to the SU2 installation?

Yes, I am using FADO. Can you help in making FADO available during regression testing?

[pcarruscag]

I'll try to do it tonight.

[pcarruscag]

It's done, I have to update the init.py script but I'll do that after I check that the FADO examples work with the current version of SU2.