CI: Pin conda in docker build

[phofl]

• xref CI: Conda 4.14 with python 3.9 broke docker build #48142

This gets ci green for now, but have to investigate what is wrong here. The first failing build updated conda from 4.13 to 4.14 with the conda install mamba command, hence the pin there

cc @mroeschke

[mroeschke]

Will this eventually affect other builds?

[phofl]

Not sure. We are using micromamba for most builds, so should not. I'll open a pr in parallel to check if we can switch to mambaforge as base image here. This should solve this.

[mroeschke]

Not sure. We are using micromamba for most builds, so should not. I'll open a pr in parallel to check if we can switch to mambaforge as base image here. This should solve this.

Sounds good. Switching to micromamba would probably be a preferred fix here.

[phofl]

Yep agreed. This is only a temporary solution to get the ci passing agai anyway

[phofl]

#48143 uses mambaforge as base image. Gets the ci back to green too

[simonjayhawkins]

#48143 uses mambaforge as base image. Gets the ci back to green too

is that the preference? and close this one?

[mroeschke]

#48143 uses mambaforge as base image. Gets the ci back to green too

is that the preference? and close this one?

Yes, that would be my preference.

[phofl]

Yep, let’s merge the other pr