Test of the sys_heap_aligned_alloc() API. This is separate from the
existing heap test because aligned_alloc() requires a kconfig to
enable it that can change the heap block header format and will impact
code coverage of the "small" block variant.
It's a fairly simple whitebox test that instantiates a heap and then
enumerates all possible alignments within it, with and without
pre-allocated data, to verify that the resulting memory is correctly
aligned and the heap stays consistent.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
