ENH: Moved STL surface to tutorial resources and updated scripts

tutorials/mesh/snappyHexMesh/flange/Allclean

tutorials/mesh/snappyHexMesh/flange/Allrun

...ials/mesh/snappyHexMesh/flange/constant/triSurface/README

.../mesh/snappyHexMesh/flange/constant/triSurface/flange.stl

tutorials/multiphase/LTSInterFoam/wigleyHull/Allclean

tutorials/multiphase/LTSInterFoam/wigleyHull/Allrun

...iphase/LTSInterFoam/wigleyHull/constant/triSurface/README

...wigleyHull/constant/triSurface/wigley-scaled-oriented.stl

...se/LTSInterFoam/wigleyHull/constant/triSurface/wigley.stl

...multiphase/interPhaseChangeFoam/cavitatingBullet/Allclean

...s/multiphase/interPhaseChangeFoam/cavitatingBullet/Allrun

...aseChangeFoam/cavitatingBullet/constant/triSurface/README

...hangeFoam/cavitatingBullet/constant/triSurface/bullet.stl

tutorials/resources/geometry/bullet.stl.gz

tutorials/resources/geometry/flange.stl.gz

tutorials/resources/geometry/wigley-scaled-oriented.stl.gz

tutorials/resources/geometry/wigley.stl.gz