HDF - Updating all remaining source and homepage URLs

[hetsko]

As discussed and partially fixed in #21105, #21129, the source urls on domain www.hdfgroup.org/ftp were apparently moved to support.hdfgroup.org/ftp. There are still old urls in easybuild/easyconfigs/h/HDF and easybuild/easyconfigs/h/h4toh5 (see below).

In my case, I have tested the new url only for HDF-4.2.15-GCCcore-10.2.0.eb, but my guess is that the situation is identical for all of the other versions/toolchains.

$ git log -1
commit bed5ca831c01aed5714c9b6597b16b6cbc6691dc (HEAD -> develop, origin/develop, origin/HEAD)
...

$ grep -Rl www.hdfgroup.org/ftp easybuild/easyconfigs/ | sort
easybuild/easyconfigs/__archive__/h/HDF/HDF-4.2.11-foss-2015a.eb
easybuild/easyconfigs/__archive__/h/HDF/HDF-4.2.7-patch1-goolf-1.4.10.eb
easybuild/easyconfigs/__archive__/h/HDF/HDF-4.2.7-patch1-ictce-5.3.0.eb
easybuild/easyconfigs/__archive__/h/HDF/HDF-4.2.8-ictce-5.3.0.eb
easybuild/easyconfigs/h/h4toh5/h4toh5-2.2.2-linux-x86_64-static.eb
easybuild/easyconfigs/h/h4toh5/h4toh5-2.2.3-foss-2018b.eb
easybuild/easyconfigs/h/h4toh5/h4toh5-2.2.3-gompi-2019b.eb
easybuild/easyconfigs/h/h4toh5/h4toh5-2.2.3-gompi-2020b.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.11-intel-2016a.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.12-intel-2017a.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.13-GCCcore-6.4.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.13-intel-2017a-no-netcdf.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.14-GCCcore-6.4.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.14-GCCcore-7.3.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.14-GCCcore-8.2.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.14-GCCcore-8.3.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.15-GCCcore-10.2.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.15-GCCcore-10.3.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.15-GCCcore-11.2.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.15-GCCcore-11.3.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.15-GCCcore-12.2.0.eb
easybuild/easyconfigs/h/HDF/HDF-4.2.15-GCCcore-9.3.0.eb