Bug 2129731

.`frr` rebased to version 8.3.1 The `frr` package for managing dynamic routing stack has been updated to version 8.3.1. Notable changes over version 8.2.2 include: * Added a new set of commands to interact with the Border Gateway Protocol (BGP): ** the `set as-path replace` command to replace the Autonomous System (AS) path attribute of a BGP route with a new value. ** the `match peer` command to match a specific BGP peer or group when configuring a BGP route map. ** the `ead-es-frag evi-limit` command to set a limit on the number of Ethernet A-D per EVI fragments that can be sent in a given period of time in EVPN. ** the `match evpn route-type` command to take specific actions on certain types of EVPN routes, such as route-target, route-distinguisher, or MAC/IP routes. * Added the `show thread timers` command in the VTYSH command-line interface for interacting with FRR daemons. * Added the `show ip ospf reachable-routers` command to display a list of routers that are currently reachable through the OSPF protocol. * Added new commands to interact with the Protocol Independent Multicast (PIM) daemon: ** the `debug igmp trace detail` command to enable debugging for Internet Group Management Protocol (IGMP) messages with detailed tracing. ** the `ip pim passive` command to to configure the interface as passive, not sending PIM messages. * Added new outputs for the `show zebra` command, such as ECMP, EVPN, MPLS statuses. * Added the `show ip nht mrib` command to the ZEBRA component to display multicast-related information from the `mroute` table in the kernel.