Move "good practice for finding software packages on Anaconda" to separate tutorial and update

[wwarriner]

What is inaccurate?

• Migrate to a separate tutorial.
• Rewrite to remove references to Anaconda, except where necessary to warn against using anaconda and r channels.

Boilerplate warning:

<!-- markdownlint-disable MD046 -->
!!! important

    The `anaconda` and `r` channels are subject to the Anaconda Terms of Service and may not be used for UAB business. The `conda-forge` and `bioconda` channels are free to use.
<!-- markdownlint-enable MD046 -->

Where is the inaccuracy?

https://docs.rc.uab.edu/workflow_solutions/using_anaconda/#good-practice-for-finding-software-packages-on-anaconda