Refactor quantize function

Add generic transpose function, use it for non-transposed (kxn) RHS packing tests.

Signed-off-by: Anitha Raj <anitha.raj@arm.com>

Signed-off-by: Michael Kozlov <michael.kozlov@arm.com>

Approved-by: Felix Johnny Thomasmathibalan <felixjohnny.thomasmathibalan@arm.com>