Some small refactorings

[tcoratger]

Some small refactorings

Description

Small refactorings.

Type of change

Please delete options that are not relevant.

• Optimization

Checklist

• Linked to Github Issue
• Unit tests added
• This change requires new documentation.
  • Documentation has been added/updated.
• This change is an Optimization
  • Benchmarks added/run

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 89.74359% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 94.62%. Comparing base (4caed4b) to head (9a432e0).

Files	Patch %	Lines
...rt_weierstrass/curves/bls12_381/field_extension.rs	86.36%	3 Missing ⚠️
math/src/elliptic_curve/short_weierstrass/point.rs	93.33%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #832   +/-   ##
=======================================
  Coverage   94.61%   94.62%           
=======================================
  Files         155      155           
  Lines       34774    34768    -6     
=======================================
- Hits        32901    32898    -3     
+ Misses       1873     1870    -3     

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