Fix compact restarts for surface_csv

[bigfooted]

Proposed Changes

Give a brief overview of your contribution here in a few sentences.

continuation of #2891
SURFACE_CSV still has a compact restart issue. Since surface_csv is not a restart file, we do not apply compactness to it.

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

Put an X by all that apply. You can fill this out after submitting the PR. If you have any questions, don't hesitate to ask! We want to help. These are a guide for you to know what the reviewers will be looking for in your contribution.

• I am submitting my contribution to the develop branch.
• My contribution generates no new compiler warnings (try with --warnlevel=3 when using meson).
• My contribution is commented and consistent with SU2 style (https://su2code.github.io/docs_v7/Style-Guide/).
• I used the pre-commit hook to prevent dirty commits and used pre-commit run --all to format old commits.
• I have added a test case that demonstrates my contribution, if necessary.
• I have updated appropriate documentation (Tutorials, Docs Page, config_template.cpp), if necessary.

[joshkellyjak]

Perhaps to prevent something like this happening again in future it is best to add some test case with expected output results?

[joshkellyjak]

LGTM code-wise, an output test would be beneficial or update to existing regression perhaps?

[bigfooted]

@joshkellyjak I added a run -> save ->restart regression test for compact restart.

[pcarruscag]

Please use python to modify the original restart on the fly, as I have done in other tests.
No duplication, means no duplication, everywhere.