Add support for bias broadcasting

add support for bias broadcasting for operators:
  - conv2d
  - conv3d
  - depthwise_conv2d
  - transpose_conv2d
  - fully_connected

could not add framework test for this because tf.nn.bias_add requires
bias size to match channel dimension.

manually tested reference model evaluation on tosa mlir with bias size
of 1

Signed-off-by: Tai Ly <tai.ly@arm.com>
Change-Id: I70d29d231a63fc03b10e3006cbd6b16b53cca1f2