Refactored RigGridBase::cellCornerVertices to return std::array<cvf::Vec3d, 8> by value instead of taking a reference to std::array as an output parameter. This change improves code readability and leverages modern C++ return value optimizations.
Updated all call sites across the codebase to reflect the new function signature.
Improved GitHub Action to run clang-format as part of clang-tidy
* Simplify clang-tidy workflow
* Added modernize-use-using, modernize-redundant-void-arg, readability-static-accessed-through-instance
* Add nolint for libecl typedefs