Allow inclusion of persistenced socket in CDI specification

This change adds an include-persistenced-socket flag to the
nvidia-ctk cdi generate command that ensures that a generated
specification includes the nvidia-persistenced socket if present on
the host.

Note that for mangement mode, these sockets are always included
if detected.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

pkg/nvcdi/lib.go

@@ -132,6 +132,9 @@ func New(opts ...Option) (Interface, error) {
 		if l.vendor == "" {
 			l.vendor = "management.nvidia.com"
 		}
+		// For management specifications we always allow the fabricmanager and
+		// persistenced sockets.
+		WithOptInFeature("include-persistenced-socket", true)(l)
 		lib = (*managementlib)(l)
 	case ModeNvml:
 		lib = (*nvmllib)(l)