BEGIN_PUBLIC

Replaced "shark" test models with lighter models to speed up tests.
END_PUBLIC.

- procedurally generated light cube
- replaced shark GMSH with cube for all tests with extension GMSH
- Reduced size of shark model used for tests with extension Ftetwild

PiperOrigin-RevId: 631776421
Change-Id: I66f6b4058b86338a10d06c39bc93bef1c6fbdab6

test/user/testdata/cube_41_ascii_vol_gmshApp.msh

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