Add intersects(Sphere, Point) and intersects(Point, Sphere)

[aprokop]

I've been using this for a while when testing different things. It makes sense to add it to the master.

[dalg24]

git grep -n "bool intersects(.*,.*)"
src/details/ArborX_DetailsAlgorithms.hpp:189:constexpr bool intersects(Box const &box, Box const &other)
src/details/ArborX_DetailsAlgorithms.hpp:199:constexpr bool intersects(Point const &point, Box const &other)
src/details/ArborX_DetailsAlgorithms.hpp:209:bool intersects(Sphere const &sphere, Box const &box)
src/details/ArborX_KDOP.hpp:283:KOKKOS_INLINE_FUNCTION bool intersects(Box const &a, KDOP<k> const &b)
src/details/ArborX_KDOP.hpp:289:KOKKOS_INLINE_FUNCTION bool intersects(KDOP<k> const &a, Box const &b)
src/details/ArborX_KDOP.hpp:295:KOKKOS_INLINE_FUNCTION bool intersects(Point const &p, KDOP<k> const &x)
src/details/ArborX_KDOP.hpp:301:KOKKOS_INLINE_FUNCTION bool intersects(KDOP<k> const &a, KDOP<k> const &b)
src/details/ArborX_Ray.hpp:193:bool intersects(Ray const &ray, Box const &box)
test/tstCompileOnlyTypeRequirements.cpp:34:KOKKOS_FUNCTION bool intersects(FakePredicateGeometry, FakeBoundingVolume) { return true; }

A few observations:

• we only have one occurrence where we provided both intersects(Foo, Bar) and intersects(Bar, Foo) (KDOP and Box) but there we actually need it for the BVH tests. I'd rather not do it for Point and Sphere, especially with no obvious motivation to do so. If we decide we want to support this, we could generate them with a single generic function.
• we usually have intersects(Geometry, BoundingVolume) so I would suggest to only implement intersects(Point, Sphere)

[aprokop]

So I often play around with construction a hierarchy on points (hacking in storing Points as bounding volumes, or other search structures (kd-tree, grid)), and search using spheres. So I actually need intersects(Sphere, Point) even more. See #586 for example.

I thought it's a no brainer to merge this small patch in. But if you are opposed, I suppose I cherry-pick this patch whenever I need it.