Robuta

https://github.com/ESMValGroup/ESMValTool/pull/1874 Align ESMValTool to ESMValCore=2.2.0 (adopt iris3, fix environment for new Core release) by... ESMValTool: A community diagnostic and performance metrics tool for routine evaluation of Earth system models in CMIP - Align ESMValTool to ESMValCore=2.2.0...