MLBEDSW-7833: MLCE: Fixed output diff for reshape op

- In order to reduce memory usage, the live range mechanism have logic
to check if the ifm tensor can be reused for the ofm tensor for certain
operators

- In this failing test case, the input to the reshape/memcpy operator
has more than one consumer and this results in a faulty memory overwrite
since there are missing logic that should check the ifm consumers for
the memcpy operator

- The fix is to add the missing logic that ifm can only have one consumer

Change-Id: I2184c0f905b554f648c9732734098509e23b537c
Signed-off-by: Johan Alfven <johan.alfven@arm.com>