Add Low Aspect Ratio DEMO case to the tracker

[ajpearcey]

We the LAR DEMO case to the tracker. We might also explore a regression test.

This is currently blocked by PR #3366 being merged.

[ajpearcey]

PR #3366 is now merged. We can also cite the design point as being from this paper.

[jmorris-uk]

@ajpearcey where is the latest LAR DEMO file?

[ajpearcey]

Attached here, although it's a bit out of date with plenty of obsolete variable names.

A_28_R_86_350MW_IN.DAT.txt

[clmould]

Updated the obsolete variables but file does not converge. @ajpearcey is getting the file to converge again