[schema] add SRv6 counters tables (#1005)

Add new tables for SRv6 counters support

Author: Yakiv-Huryk

common/schema.h

@@ -238,6 +238,7 @@ namespace swss {
 #define COUNTERS_FABRIC_QUEUE_NAME_MAP      "COUNTERS_FABRIC_QUEUE_NAME_MAP"
 #define COUNTERS_FABRIC_PORT_NAME_MAP       "COUNTERS_FABRIC_PORT_NAME_MAP"
 #define COUNTERS_TWAMP_SESSION_NAME_MAP     "COUNTERS_TWAMP_SESSION_NAME_MAP"
+#define COUNTERS_SRV6_NAME_MAP              "COUNTERS_SRV6_NAME_MAP"
 
 #define COUNTERS_NAT_TABLE              "COUNTERS_NAT"
 #define COUNTERS_NAPT_TABLE             "COUNTERS_NAPT"
@@ -288,6 +289,7 @@ namespace swss {
 #define ACL_COUNTER_ATTR_ID_LIST        "ACL_COUNTER_ATTR_ID_LIST"
 #define FLOW_COUNTER_ID_LIST            "FLOW_COUNTER_ID_LIST"
 #define POLICER_COUNTER_ID_LIST         "POLICER_COUNTER_ID_LIST"
+#define SRV6_COUNTER_ID_LIST            "SRV6_COUNTER_ID_LIST"
 #define PLUGIN_TABLE                    "PLUGIN_TABLE"
 #define LUA_PLUGIN_TYPE                 "LUA_PLUGIN_TYPE"
 #define SAI_OBJECT_TYPE                 "SAI_OBJECT_TYPE"