refactor(configs): migrate management interface to Management0

This commit updates the management interface configuration across all leaf and spine switches to align with the target environment requirements.

Changes include:
- Changing the primary management interface from `Management1` to `Management0`.
- Removing the `vrf mgmt` assignment, moving the interface to the default global routing table.
- Explicitly configuring `lldp management-address Management0` to ensure the correct management IP is advertised to neighbors.

configs/leaf5.cfg

@@ -3,6 +3,9 @@
 !
 hostname leaf5
 !
+! LLDP Management0
+lldp management-address Management0
+!
 ! enable gNMI API
 management api gnmi
    transport grpc default
@@ -28,8 +31,7 @@ vlan 4091
    trunk group mlag-peer
 !
 ! Management interface
-interface Management1
-   vrf mgmt
+interface Management0
    ip address 172.16.0.29/24
 !
 ! MLAG Peer-link SVI