[NVIDIA-IMEX] Test epoch version

Author: Himani Anil Deshpande

cookbooks/aws-parallelcluster-platform/resources/nvidia_imex/nvidia_imex_ubuntu22+.rb

@@ -19,5 +19,8 @@
 use 'partial/_nvidia_imex_common.rb'
 
 def _nvidia_imex_version
-  "#{nvidia_driver_major_version}_#{nvidia_imex_full_version}"
+  "1:#{nvidia_driver_major_version}_#{nvidia_imex_full_version}"
+  # The single digit "1" is epoch version. Without the "1", package install fails because version does not exist.
+  # See details here:
+  # https://askubuntu.com/questions/441879/why-do-some-packages-have-extra-numbers-before-a-colon-on-the-front-of-their-ver
 end