To remove the UCX dependency on the JURECA Booster

Overlays/jurecabooster_overlay/i/impi/impi-2021.4.0-intel-compilers-2021.4.0.eb

+name = 'impi'
+version = '2021.4.0'
+
+homepage = 'https://software.intel.com/content/www/us/en/develop/tools/mpi-library.html'
+description = "Intel MPI Library, compatible with MPICH ABI"
+
+toolchain = {'name': 'intel-compilers', 'version': '2021.4.0'}
+
+# see https://software.intel.com/content/www/us/en/develop/articles/oneapi-standalone-components.html
+source_urls = [
+    'https://registrationcenter-download.intel.com/akdlm/irc_nas/18186/']
+sources = ['l_mpi_oneapi_p_%(version)s.441_offline.sh']
+checksums = ['cc4b7072c61d0bd02b1c431b22d2ea3b84b967b59d2e587e77a9e7b2c24f2a29']
+
+moduleclass = 'mpi'