Create dedicated conda when dealing with Windows

On Windows, there is no isolation of the CI runners. The conda base is shared by all the projects.

So what we was polluting the Lima CI envs.

This MR isolate conda config from the base in order to make it unique per jobs.

Could you take a look at it @debionne @formet?

• Notice the reaction of a new env per jobs
• And the use of config --env to only setup the actual env.