[WIP] Test for adding in the implicit viscous solver for NEMO

[WallyMaier]

Proposed Changes

This PR addresses adding in the Jacobians for the NEMO convective, viscous and source terms. Much improvement and testing is still needed, but I was hoping to get feedback on some coding methodologies/strategies to avoid code bloat, etc.

I would very much appreciate thoughts and feedback!

Related Work

This is a continuation of the recent NEMO improvements/modernization #1343 and #1347

PR Checklist

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• I have added a test case that demonstrates my contribution, if necessary.
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[WallyMaier]

@pcarruscag, I hope this is the last question, it seems the Matrix<NSPECIES, NSPECIES> dJdr_I causes some issues : "subscripted value is neither array nor pointer nor vector" when trying to anything with it. However, it seems all the other matrices dont have any issues. Do you have any ideas?

[lgtm-com]

This pull request introduces 2 alerts when merging 471a34a into c531be4 - view on LGTM.com

new alerts:

• 1 for Multiplication result converted to larger type
• 1 for Comparison of narrow type with wide type in loop condition

[lgtm-com]

This pull request introduces 2 alerts when merging c0979aa into b718c1f - view on LGTM.com

new alerts:

• 1 for Multiplication result converted to larger type
• 1 for Comparison of narrow type with wide type in loop condition

[lgtm-com]

This pull request introduces 1 alert when merging ab8db24 into b718c1f - view on LGTM.com

new alerts:

• 1 for Multiplication result converted to larger type

[lgtm-com]

This pull request introduces 1 alert and fixes 16 when merging 50c2352 into b718c1f - view on LGTM.com

new alerts:

• 1 for Multiplication result converted to larger type

fixed alerts:

• 16 for Comparison of narrow type with wide type in loop condition