Merge branch 'barry/2024-04-29/add-fortran-enums' into 'main'

Major updates to Fortran interface

See merge request petsc/petsc!7517

CI: remove linux-pgi, linux-nagfor, and add linux-flang-arm (without -Werror)
CI: use --with-fortran-bindings=0 linux-cuda-single-cxx as nfortran does not support F2008