RSDK-9884 - support invisible aliases

[stuqdog]

Updates the String method of AliasStringFlag to hide aliases, and ensures that AliasStringFlag is used consistently for organization, location, machine, and part.

Note: I opted to update AliasStringFlag rather than creating a new InvisibleAliasStringFlag type. My reasoning was 1) avoiding excessive type proliferation is a good thing, and 2) the only places AliasStringFlag was being used was for org/location/machine/part, so after this PR it wasn't actually being used anywhere. However, if in the future we have a string flag that is required and has aliases that we don't want to hide in the help text, we may have to revisit. Happy to discuss the decision here if there's any pushback.

Tested locally to confirm the new help text, and to confirm that despite not appearing in help text, the aliases are still respected.

viam machine part shell the old way:

viam machine part shell the new way:

cc @JessamyT