Allow wildcards in force:source:retrieve/deploy

[WillieRuemmele]

Discussed in #2363

^{Originally posted by catalandres September 22, 2019}
Is your feature request related to a problem? Please describe.
I am trying to download only the classes related to a project in an org. We have named them consistently with a prefix and we would like to be able to retrieve and deploy only a subset of them. That way we will not risk overwriting another team's progress by deploying a past version of a file unrelated to our project.

What are you trying to do
See above.

Describe the solution you'd like
sfdx force:source:retrieve -m 'ApexClass:SomePrefix_*' should put in the classes folder only the classes that begin with SomePrefix_.

Describe alternatives you've considered
The one alternative that I can think for a wildcard retrieval would be to manually delete any files that are not in scope after the retrieval.
The alternative to a deployment with a wildcard (if it is not viable to delete files upon retrieval) is to list all the necessary classes one by one.

Additional context
Not applicable.

[git2gus]

This issue has been linked to a new work item: W-13867893