Expanding the sage.tensor to handle multi-dimensional tensors

[amanmoon]

Implementation of multi-dimensional arrays in sage.tensor.

• In the TensorFreeModule.__init__ and FreeModuleTensor.__init__ now the self._fmodule argument stores the modules as a tuple.
• Made the self._tensor_type argument conditional, it will not be initiated when the user creates tensor product of different modules.
• Added a new argument self._shape.

Fixes #38247