[mamba] Executes lots of conda search commands

[Antony Frolov]

Sanity checks

• My issue relates to a specific CLI completion spec (e.g. git checkout is missing options in git completion spec). If your issue is more general, please create your issue here: withfig/fig
• I have searched github.com/withfig/autocomplete/issues and there are no duplicates of my issue
• I would like to work on this.

What CLI tool does this relate to?

mamba

Which statement makes the most sense?

There is a bug with this completion spec

Issue Details

Completion for mamba launches 1 to 10 conda search commands and uses lots of CPU. Meanwhile there's no such logic in conda completion. Guess this should be fixed.