Use modern compilers in RHEL

GCC Toolset enables modern compiler selection for RHEL users. G++ / Gfortran example:

dnf install gcc-toolset-13-gcc-gfortran gcc-toolset-13-gcc-c++

Thereafter, users without sudo use the new Gfortran version by:

source scl_source enable gcc-toolset-13

Prior to RHEL 8, this was known as Developer Toolset devtoolset.