File specific configuration should be respected over global configuration.

[jamesHargreaves12]

With config from .globalconfig, roslynator analyzers should respect file-specific diagnostic severities over those set globally.

For example, if we have a .globalconfig file that looks like the following:

is_global = true
dotnet_diagnostic.RCS1007.severity = none

[/dev/repo/File.cs]
dotnet_diagnostic.RCS1007.severity = warning

The current behaviour is that RCS1007 will not be applied to any files.

I would expect the diagnostic to be applied to File.cs but not the rest of the files in the repository (which is consistent with how analyzers from Roslyn (and the majority of roslynator analyzers) work.