feat(icmp): add Terraform module for icmp

- Add iosxr_icmp.tf singleton resource with ipv4/ipv6 attribute mappings
- Wire iosxr_icmp.icmp into main.tf depends_on (alphabetical order)

Co-authored-by: Robert Crowe <rocrowe@cisco.com>

Author: rocrowe

iosxr_icmp.tf

@@ -0,0 +1,13 @@
+resource "iosxr_icmp" "icmp" {
+  for_each = { for device in local.devices : device.name => device if try(local.device_config[device.name].icmp, null) != null || try(local.defaults.iosxr.devices.configuration.icmp, null) != null }
+  device   = each.value.name
+
+  ipv4_source_vrf                     = try(local.device_config[each.value.name].icmp.ipv4.source_vrf, local.defaults.iosxr.devices.configuration.icmp.ipv4.source_vrf, null)
+  ipv4_source_rfc                     = try(local.device_config[each.value.name].icmp.ipv4.source_rfc, local.defaults.iosxr.devices.configuration.icmp.ipv4.source_rfc, null)
+  ipv4_rate_limit_unreachable_rate    = try(local.device_config[each.value.name].icmp.ipv4.rate_limit_unreachable_rate, local.defaults.iosxr.devices.configuration.icmp.ipv4.rate_limit_unreachable_rate, null)
+  ipv4_rate_limit_unreachable_disable = try(local.device_config[each.value.name].icmp.ipv4.rate_limit_unreachable_disable, local.defaults.iosxr.devices.configuration.icmp.ipv4.rate_limit_unreachable_disable, null)
+  ipv4_rate_limit_unreachable_df_rate    = try(local.device_config[each.value.name].icmp.ipv4.rate_limit_unreachable_df_rate, local.defaults.iosxr.devices.configuration.icmp.ipv4.rate_limit_unreachable_df_rate, null)
+  ipv4_rate_limit_unreachable_df_disable = try(local.device_config[each.value.name].icmp.ipv4.rate_limit_unreachable_df_disable, local.defaults.iosxr.devices.configuration.icmp.ipv4.rate_limit_unreachable_df_disable, null)
+  ipv6_source_vrf                     = try(local.device_config[each.value.name].icmp.ipv6.source_vrf, local.defaults.iosxr.devices.configuration.icmp.ipv6.source_vrf, null)
+  ipv6_source_rfc                     = try(local.device_config[each.value.name].icmp.ipv6.source_rfc, local.defaults.iosxr.devices.configuration.icmp.ipv6.source_rfc, null)
+}

main.tf

@@ -158,6 +158,7 @@ resource "iosxr_cli" "cli_0" {
     iosxr_ftp.ftp,
     iosxr_gnmi.gnmi,
     iosxr_hostname.hostname,
+    iosxr_icmp.icmp,
     iosxr_interface_bundle_ether.bundle_ether,
     iosxr_interface_bundle_ether_subinterface.bundle_ether_subinterface,
     iosxr_interface_bvi.bvi,