Don't check for UWP files while signing in arm64
Don't check for UWP files while signing in arm64

UWP is not supported in arm64, hence do not check for the existence of files to sign if the RID is win-arm64
wtgodbe/core-setup,weshaggard/core-setup,weshaggard/core-setup,MichaelSimons/core-setup,weshaggard/core-setup,wtgodbe/core-setup,steveharter/core-setup,rakeshsinghranchi/core-setup,chcosta/core-setup,weshaggard/core-setup,chcosta/core-setup,weshaggard/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,chcosta/core-setup,zamont/core-setup,chcosta/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup,wtgodbe/core-setup,rakeshsinghranchi/core-setup,crummel/dotnet_core-setup,ericstj/core-setup,wtgodbe/core-setup,MichaelSimons/core-setup,chcosta/core-setup,crummel/dotnet_core-setup,rakeshsinghranchi/core-setup,chcosta/core-setup,zamont/core-setup,steveharter/core-setup,ericstj/core-setup,wtgodbe/core-setup,steveharter/core-setup,steveharter/core-setup,zamont/core-setup,wtgodbe/core-setup,rakeshsinghranchi/core-setup,ericstj/core-setup,ericstj/core-setup,MichaelSimons/core-setup,steveharter/core-setup,steveharter/core-setup,weshaggard/core-setup,rakeshsinghranchi/core-setup,ericstj/core-setup,zamont/core-setup,zamont/core-setup,ericstj/core-setup,rakeshsinghranchi/core-setup,zamont/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup