fix debug vrf functionality in staticd

[choppsv1]

#14048 fixed a problem we had with staticd processing YANG config from mgmtd and also CLI commands from vtysh by not sending the vrf commands to staticd. This unfortunately also disabled debug vrf as well. So we need to restore that by re-enabling sending commands from vtysh but removing the config handlers.

Additionally though we also need to come up with a generic solution for config level debug commands, as I do not believe these have been modeled in YANG yet.

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