Delete cuda toolchain with old gcc

toolchains/gcc-11_5_0-openmpi-4_1_4-cuda-12_2/compiler_vars.sh

-toolchain_compiler_package="gcc@11.5.0"
-export TOOLCHAIN_COMPILER=$toolchain_compiler_package

toolchains/gcc-11_5_0-openmpi-4_1_4-cuda-12_2/spack.yaml.jinja

-spack:
-  definitions:
-  - compilers:
-    - "{{ toolchain_compiler }}"
-  - mpis:
-    - openmpi@4.1.4+cuda cuda_arch=70 fabrics=ucx schedulers=slurm ^slurm@22-05-8-1+pmix^ucx@1.13.1+cma+cuda+dc+dm+gdrcopy+ib_hw_tm+knem+mlx5_dv+rc+rdmacm+thread_multiple+ud+verbs~vfs~xpmem
-      ^cuda@12.2.2+allow-unsupported-compilers
-  - packages:
-    - binutils@2.38+headers+ld
-    - openblas@0.3.20
-    # autotools 20210128 not in spack; manually
-    - autoconf@2.71
-    - libtool@2.4.7
-    - automake@1.16.5
-    - cmake@3.26.6
-    - ninja@1.11.1
-    # octopus dependencies:
-    - libxc@5.2.3+kxc
-    - spglib@2.1.0
-    - gsl@2.7.1
-    - sparskit@develop
-    - nlopt@2.7.0
-    - libgd@2.2.4
-    - nfft@3.2.4
-    - python@3.9.5
-    - cgal@5.0.3
-    - dftbplus@21.2~arpack~gpu~mpi~sockets~transport+api+shared~openmp # non gpu and non openmp variant based on the easybuild configuration (octopus does not use gpu variant) non mpi based on Franco's suggestion
-    - libpspio@0.4.1+fortran
-  - packages_with_mpi:
-    - fftw@3.3.10+openmp+mpi+pfft_patches
-    - netlib-scalapack@2.1.0
-    # octopus dependencies:
-    - elpa@2021.11.001+cuda cuda_arch=70 ^cuda@12.2.2+allow-unsupported-compilers  # elpa@2020.05.001
-    - libvdwxc@0.4.0+mpi+pfft
-    - berkeleygw@3.0.1+mpi
-    - parmetis@4.0.3+int64
-    - pfft@1.0.8-alpha
-    - pnfft@1.0.7-alpha
-    - hdf5@1.12.2+mpi
-    - netcdf-fortran@4.6.0 ^netcdf-c+mpi
-    - bigdft-futile@1.9.2+shared+mpi
-    - bigdft-psolver@1.9.2+shared+mpi~cuda  # octopus does not use cuda variant
-    - etsf-io@1.0.4
-  specs:
-  - matrix:
-    - [$mpis]
-    - [$%compilers]
-  - matrix:
-    - [$packages]
-    - [$%compilers]
-  - matrix:
-    - [$packages_with_mpi]
-    - [$^mpis]
-    - [$%compilers]
-  view: true
-  concretizer:
-    reuse: false
-    unify: true
-  packages:
-    all:
-      require: "%{{ toolchain_compiler }}"
-