MLBEDSW-10635: ReinterpretCast operator and cast to int64

Implemented a ReinterpretCast operator which can be used to reinterpret tensors with different data types and sizes. Additionally added support for non hardware supported cast to in64 by replacing the operation with 4 sequential cast and reinterpret operations.

Change-Id: Ie7032cd5384c17a766dd17034cd59871bb1a833d
Signed-off-by: Max Bergfelt <max.bergfelt@arm.com>