archive all easyconfigs using 2020a toolchains

[lexming]

Archiving:

• 1070 easyconfigs in toolchains that belong to 2020a generation
• 129 patches that become unused without those easyconfigs

[Micket]

Missing dependencies: GCCcore/9.3.0, GCC/9.3.0, GCC/9.3.0, binutils/2.34-GCCcore-9.3.0, Autotools/20180311-GCCcore-9.3.0, OpenMPI/4.0.3-GCC-9.3.0, numactl/2.0.13-GCCcore-9.3.0, zlib/1.2.11-GCCcore-9.3.0, BLIS/2.2-GCCcore-9.3.0-amd, BLIS/0.8.0-GCCcore-9.3.0, libFLAME/2.2-GCCcore-9.3.0-amd, libFLAME/5.2.0-GCCcore-9.3.0, ScaLAPACK/2.2-gompi-2020a-amd, ScaLAPACK/2.1.0-gompi-2020a-bf, FFTW/3.3.8-gompi-2020a-amd, FFTW/3.3.8-gompi-2020a (no easyconfig file or existing module found)

I found

n/NVHPC/NVHPC-20.7.eb
n/NVHPC/NVHPC-20.9.eb
n/NVHPC/NVHPC-20.11.eb
c/ccache/ccache-3.7.11.eb

that also needs to go.