Add section of shape operators

Rework of the shape operations. Shape operations are now done in shape specific
operators rather than being based on type.

shape_t is reworked to a list of size_t values.

Signed-off-by: Eric Kunze <eric.kunze@arm.com>
Change-Id: I2fca0728f9caa6a6fc34a8ce9e389bb581eea959