Allow wildcard in rm_safe call

[AbrilRBS]

Changelog: Feature: Allow * wildcard as subsetting in in rm_safe.
Docs: conan-io/docs#3697

To check with the team, came up in a conversation with @czoido when trying to debug the openjdk permission issues

Note that this is just a draft, because this is pretty similar to doing

 for subsetting in self.settings.compiler.fields:
     self.settings.compiler.rm_safe(subsetting)

so we might now want to have two ways of doing the same thing, even if the current syntaxt is a bit unknown (There's something to say from me just realizing about the fields property)

[czoido]

I really think this could be useful 👏

[memsharded]

Looks good

[franramirez688]

👏