Ensure __module__ is fine on node class creation

[pfebrer]

Small change to ensure that the __module__ variable is set as expected on creation of a node class from a function.

[codecov]

Codecov Report

Attention: Patch coverage is 72.72727% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 86.85%. Comparing base (1f429c3) to head (620e7d6).

Files	Patch %	Lines
src/sisl/nodes/tests/test_node.py	77.77%	2 Missing ⚠️
src/sisl/nodes/utils.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #739   +/-   ##
=======================================
  Coverage   86.85%   86.85%           
=======================================
  Files         408      408           
  Lines       51688    51696    +8     
=======================================
+ Hits        44896    44903    +7     
- Misses       6792     6793    +1     

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