[PyOV] Constant/Tensor from scalars

[jiwaszki]

Details:

• Improve implementation of Constant/Tensor to allow creation of scalars from numpy arrays with 0-dim.
• Updated data_dispatcher to use new feature. Adjust the function to correctly consume scalars in other forms.
• Added test cases for new constructors and inference with scalar inputs. Check for data sharing in various cases (in other words, validate inner-workings of data_dispatcher).

Example:

In [1]: import numpy as np
   ...: import openvino.runtime as ov
   ...: 
   ...: value = np.array(1)
   ...: t_copy = ov.Tensor(value, shared_memory=False)
   ...: t_shared = ov.Tensor(value, shared_memory=True)
   ...: 

In [2]: t_copy.data
Out[2]: array(1)

In [3]: np.shares_memory(t_copy.data, value)
Out[3]: False

In [4]: t_shared.data
Out[4]: array(1)

In [5]: value[()] = 3

In [6]: t_shared.data
Out[6]: array(3)

In [7]: np.shares_memory(t_shared.data, value)
Out[7]: True

Tickets:

• 104709