Fix CL workload creation methods not using MakeWorkload
Fix CL workload creation methods not using MakeWorkload

* Wrap CL workload creation methods into MakeWorkload to
  ensure proper handling of ClError exceptions

Signed-off-by: Aron Virginas-Tar <3a0dcb9f237ba4421ab064af2ee32b804b28219b@arm.com>
Change-Id: Id6b743b4682c092316b4775baa065921780dd24a

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn