Fix LUT and species clipping

[bigfooted]

Proposed Changes

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

1. arrays in gettriangle need to be size 2 instead of 3
2. error message that checks species clipping only checks if the keyword is present, not if clipping is on
3. added setblock_zero "per-species" to CSysVector (added here to reduce the mega-PR for the flamelet model)
4. fix speling eror

Related Work

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

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[pcarruscag]

This is not needed, just do vector(ipoint, ivar) = 0

[bigfooted]

OK, I get it, we directly do LinSysRes(iPoint,iVar) = 0 and we do not introduce this function at all.

[pcarruscag]

Yep 👍