libvirt/constants.go: Add arch info to download machine-driver-libvir…

…t binary

machine-driver-libvirt now have arm64 and amd64 binary for linux platfrom. This PR
will make sure correct binary is downloaded and used for specific
platform. Name of the binary should be `machine-driver-libvirt` because
this name is hard-coded as part of the plugin

- https://github.com/crc-org/machine/blob/master/libmachine/drivers/plugin/localbinary/plugin.go#L55-L63

Now during start user get follow warning which need to be ignored
```
WARN Executable name is crc-driver-libvirt but extracted file name is crc-driver-libvirt-amd64
```

pkg/crc/machine/libvirt/constants.go

@@ -5,6 +5,7 @@ package libvirt
 
 import (
 	"fmt"
+	"runtime"
 
 	"github.com/crc-org/crc/v2/pkg/crc/constants"
 )
@@ -25,7 +26,7 @@ const (
 )
 
 var (
-	MachineDriverDownloadURL = fmt.Sprintf("https://github.com/crc-org/machine-driver-libvirt/releases/download/%s/%s", MachineDriverVersion, machineDriverCommand)
+	MachineDriverDownloadURL = fmt.Sprintf("https://github.com/crc-org/machine-driver-libvirt/releases/download/%s/%s-%s", MachineDriverVersion, machineDriverCommand, runtime.GOARCH)
 )
 
 func MachineDriverPath() string {