COMPMID-3439: Fix peephole and projection in CLQLSTMLayer

COMPMID-3439: Fix peephole and projection in CLQLSTMLayer

The followings are essential to make it work

- QSYMM16 is added as supported data type in CLGEMMLowpOutputStage
- Internal TensorCopyKernel is added similar to NEQLSTMLayer

The followings are fix for related things.

- Projection is modified to remove copy of projection_bias from
  NEQLSTMLayer.
- Fix wrong argument for validate_mm()
- validate_mm() now returns on error.

Change-Id: Icbd04e9fdb8821eb41dd3e0a6a0980965b779714
Signed-off-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3177
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>