Removes ASV version pin and pin Conda version for ASV workflow

[kafitzgerald]

PR Summary

Removes ASV version pin and pin micromamba version for ASV workflow
Closes #555
Closes #607 (though we should log another issue or keep this open until we can unpin conda)

PR Checklist

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[kafitzgerald]

This changes from micromamba to miniconda so that we can easily set the conda version to avoid the current ASV failure. It looks like we can do environment caching w/ miniconda now too though it's a bit clunkier I think and I haven't implemented that yet.

It also unpins the ASV version since the new one works and moves that install from pip to conda since that's now an option.

See here for an example workflow run: https://github.com/kafitzgerald/geocat-comp/actions/runs/8898705224/job/24436440204

[kafitzgerald]

Caching packages rather than envs didn't really help to the same degree so I went back and set up env caching. It's a good bit more verbose than with the micromamba action, but it gets the job done for now and we can switch back later if desired.

Should be good to go now hopefully.

[anissa111]

This looks good, thanks for fixing this!