MLBEDSW-2809: Redo the Tensor addressing

Added a static class TensorAddressMap that stores all Tensor addresses
based on their equivalence_id. Made the "address" field into a property
which getter and setter looks up/sets the tensor's address in
TensorAddressMap.

This makes the references to cpu_tensor/npu_tensor obsolete and they
have been removed.

Addition to scheduler: avoid SRAM spilling if an op has consumers in
other subgraphs.

Minor rework in LUTState; it will now assign a unique equivalence_id to
the SHRAM lut tensor to avoid issues with addressing. The equivalent
checks in LUTState now compares the values of the LUT instead of the the
equivalence_id.

Updated LUT unit tests accordingly.

Signed-off-by: Jacob Bohlin <jacob.bohlin@arm.com>
Change-Id: I41de5a8a4e5f07b77d6544d8d4034b754993e503