feat: Gravity

[bd713]

Prerequisites:

• feat: Add scatter data history #3791 for scatter HDF5 outputs
• feat: Enable scalar value setting from Python via PyWrapper #3718 for scalar value from Python

Companion PR in geosPythonPackages:

• PR 110 for Gravity solver Python interface

[codecov]

Codecov Report

❌ Patch coverage is 70.01103% with 272 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.98%. Comparing base (4b43fe3) to head (730b4d4).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...s/gravity/GravityFE_CompositionalMultiphaseFVM.cpp	0.00%	175 Missing ⚠️
...nents/physicsSolvers/gravity/GravitySolverBase.cpp	44.21%	53 Missing ⚠️
...oreComponents/physicsSolvers/gravity/GravityFE.cpp	89.22%	18 Missing ⚠️
...ileIO/timeHistory/ScatterDataHistoryCollection.cpp	91.75%	8 Missing ⚠️
...s/gravity/GravityFE_CompositionalMultiphaseFVM.hpp	27.27%	8 Missing ⚠️
...ponents/fileIO/timeHistory/ScatterDataProvider.hpp	25.00%	6 Missing ⚠️
...oreComponents/physicsSolvers/gravity/GravityFE.hpp	66.66%	2 Missing ⚠️
...s/fileIOTests/testScatterDataHistoryCollection.cpp	99.09%	1 Missing ⚠️
...nents/unitTests/gravityTests/testGravitySolver.cpp	98.57%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3715      +/-   ##
===========================================
+ Coverage    58.74%   58.98%   +0.23%     
===========================================
  Files         1278     1289      +11     
  Lines       110246   111061     +815     
===========================================
+ Hits         64766    65504     +738     
- Misses       45480    45557      +77     

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