[IN REVIEW] Refactor EAS to handle NonLinearElastic

[tarun-mitruka]

This PR focuses on refactoring enhancedassumedstrains.hh such that it is compatible also with nonlinearelastic.hh.

See CHANGELOG.md for more details.

See also Issue #331.

DONE

• [x] Include updateState(/*...*/) in mixin.hh
• [x] Get rid of noAssembler() argument for nonlinop construcor
• [x] Does updateStateImpl() need to be a template of scalartype?
• [x] Incorporate the call of the updateState() function in nonlinear solvers. (see below the call by FEGenericObserver as an example)
• [x] Check if AutoDiff tests could be refactored even further
• [x] Can we make a default implementation for updateState() or does every element need to implement this - Every element has to implement as it can then also be used for instance to update history variables while working with plasticity.
• [x] Add tests performing a nonlinear analysis along with the EAS method.
• [x] Fix/Add Python bindings accordingly

// In newtonraphson.hh
this->notify(NonLinearSolverMessages::SOLUTION_UPDATED, correction_);

// In main.cpp
auto updateStateObserver = std::make_shared<Ikarus::FEGenericObserver<Ikarus::NonLinearSolverMessages>>(
    Ikarus::NonLinearSolverMessages::SOLUTION_UPDATED, [&](const Eigen::VectorXd& correction_) {
      for (auto& fe : fes) {
        req.insertGlobalSolution(Ikarus::FESolutions::displacement, D_Glob)
            .insertParameter(Ikarus::FEParameter::loadfactor, lambda);
        fe.updateState(req, correction_);
      }
});

nr->subscribeAll({updateStateObserver });

OTHER PR

• Check and implement stresses (NonlinearElastic + EAS) -> To be done along with #285
• Rework EAS with possible enhancements on displacement gradient and deformation gradient -> To be done after #85
• Functionality to switch/transform between total Lagrangian and two point formulations -> To be done along with #86

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 93.04813% with 13 lines in your changes missing coverage. Please review.

Project coverage is 81.22%. Comparing base (f1928da) to head (503e6bb).

Files with missing lines	Patch %	Lines
...finiteelements/mechanics/enhancedassumedstrains.hh	92.75%	5 Missing :warning:
...karus/finiteelements/mechanics/nonlinearelastic.hh	91.66%	4 Missing :warning:
ikarus/finiteelements/mechanics/linearelastic.hh	93.02%	3 Missing :warning:
...olver/newtonraphsonwithscalarsubsidiaryfunction.hh	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #325 +/- ## ========================================== + Coverage 80.86% 81.22% +0.36% ========================================== Files 68 69 +1 Lines 2299 2397 +98 ========================================== + Hits 1859 1947 +88 - Misses 440 450 +10 ``` | [Flag](https://app.codecov.io/gh/ikarus-project/ikarus/pull/325/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ikarus-project) | Coverage Δ | | |---|---|---| | [tests](https://app.codecov.io/gh/ikarus-project/ikarus/pull/325/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ikarus-project) | `81.22% <93.04%> (+0.36%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ikarus-project#carryforward-flags-in-the-pull-request-comment) to find out more.

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[tarun-mitruka]

@rath3t The C++ side of this PR is ready for the first review, the Python bindings side will be updated after the C++ side is converged in either this PR or via a separate PR by @henrij22