[FRR]Adding additional FRR dumps (sonic-net#4073)

What I did
Adding additional FRR dumps

How I did it
Added show zebra dplane providers and modifying show thread to show event commands

How to verify it
Running show techsupport and verifying the output

Author: dgsudharsan

scripts/generate_dump

@@ -794,6 +794,7 @@ save_frr_info() {
     save_vtysh "show ipv6 route vrf all nexthop-group" "frr.ip6_route.nhg"
     save_vtysh "show zebra fpm stats" "frr.fpm.stats"
     save_vtysh "show zebra dplane detailed" "frr.dplane"
+    save_vtysh "show zebra dplane providers" "frr.dplane.providers"
     save_vtysh "show interface vrf all" "frr.interfaces"
     save_vtysh "show zebra" "frr.zebra"
     save_vtysh "show zebra client" "frr.zebra.client"
@@ -807,8 +808,8 @@ save_frr_info() {
     save_vtysh "show mpls fec" "frr.mpls.fec"
     save_vtysh "show nexthop-group rib" "frr.nhg.rib"
     save_vtysh "show route-map" "frr.route_map"
-    save_vtysh "show thread cpu" "frr.thread_cpu"
-    save_vtysh "show thread poll" "frr.thread_poll"
+    save_vtysh "show event cpu" "frr.event_cpu"
+    save_vtysh "show event poll" "frr.event_poll"
     save_vtysh "show debugging hashtable" "frr.debugging_hashtable"
     save_vtysh "show work-queues" "frr.work_queues"
     save_vtysh "show memory" "frr.memory"