Update conda channel alias

Artifactory added native support for conda repository.
The URL should include /api/conda.

JIRA INFRA-604

files/system_condarc

 pinned_packages:
   - anaconda-main::conda
   - anaconda-main::conda-build
-channel_alias: https://artifactory.esss.lu.se/artifactory
+channel_alias: https://artifactory.esss.lu.se/artifactory/api/conda
 channels:
   - ics-conda
   - conda-forge