Fermat_little_theorem type annotation (#9794)

* Replacing the generator with numpy vector operations from lu_decomposition.

* Revert "Replacing the generator with numpy vector operations from lu_decomposition."

This reverts commit ad217c66165898d62b76cc89ba09c2d7049b6448.

* Added type annotation.

* Update fermat_little_theorem.py

Used other syntax.

* Update fermat_little_theorem.py

* Update maths/fermat_little_theorem.py

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Co-authored-by: Tianyi Zheng <[email protected]>