REFACTOR: Material to match gRPC implementation

[SMoraisAnsys]

Following a discussion on how gRPC's Material is currently implemented.

Note: prior to this changes, the implementation was leveraging a __property attribute which was updated every time a property, like conductivity, was accessed. However, the gRPC doesn't have such attribute so it does not make sense to keep it in dotnet.

[svandenb-dev]

LGTM

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.36%. Comparing base (500756e) to head (6ab05b7).
Report is 301 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #901      +/-   ##
==========================================
- Coverage   84.16%   82.36%   -1.80%     
==========================================
  Files         105      159      +54     
  Lines       17938    20872    +2934     
==========================================
+ Hits        15097    17191    +2094     
- Misses       2841     3681     +840     

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[svandenb-dev]

LGTM