Use generate library for ERROR_IF tests

Switch to using the generate library for all data generation.
Also clean up compliance to always use verify library apart from
ERROR_IF tests as all data types are supported.

Add BOOL and INT48 support to fixed data generator. Alias SHAPE
type support to INT32 for other data generators.
Improve unsupported data type reporting from data generator.
Updated fixed_data unit tests to test bool and other types.

Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Change-Id: I45dd4df39aa8e88c3d84f5268ff3e1c8c79ca6d5