fix(enos): Remove brackets from standalone IPv6 addresses (#5739)

CHANGELOG.md

@@ -9,6 +9,16 @@ Canonical reference for changes, improvements, and bugfixes for Boundary.
 * Adds support to parse User-Agent headers and emit them in telemetry events
   ([PR](https://github.com/hashicorp/boundary/pull/5645)).
 
+### Deprecations/Changes
+
+* Modified parsing logic for various IP/host/address fields across Boundary.
+  Notably, for some fields, Boundary previously required bracket-enclosed 
+  IPv6 addresses (eg: `[::1]`). With this change, if the provided address is
+  just an IPv6 literal, enclosing the address in brackets is not valid.
+  Additionally, an input address containing an IPv6 literal may be modified by
+  Boundary to conform with RFC 5952.
+  ([PR](https://github.com/hashicorp/boundary/pull/5599))
+
 ## 0.19.2 (2025/05/08)
 ### New and Improved
 

enos/modules/aws_target/main.tf

@@ -150,9 +150,9 @@ resource "enos_remote_exec" "wait" {
 }
 
 output "target_private_ips" {
-  value = var.ip_version == "4" ? aws_instance.target.*.private_ip : formatlist("[%s]", flatten(aws_instance.target.*.ipv6_addresses))
+  value = var.ip_version == "4" ? aws_instance.target.*.private_ip : flatten(aws_instance.target.*.ipv6_addresses)
 }
 
 output "target_public_ips" {
-  value = var.ip_version == "4" ? aws_instance.target.*.public_ip : formatlist("[%s]", flatten(aws_instance.target.*.ipv6_addresses))
+  value = var.ip_version == "4" ? aws_instance.target.*.public_ip : flatten(aws_instance.target.*.ipv6_addresses)
 }

testing/internal/e2e/tests/aws/dynamichostcatalog_host_set_test.go

@@ -171,10 +171,8 @@ func TestCliCreateAwsDynamicHostCatalogWithHostSet(t *testing.T) {
 	require.Greater(t, len(s.Connections), 0)
 	var hostIp string
 	switch c.IpVersion {
-	case "4":
+	case "4", "6", "dual":
 		hostIp = s.Connections[0].EndpointTcpAddress
-	case "6", "dual":
-		hostIp = fmt.Sprintf("[%s]", s.Connections[0].EndpointTcpAddress)
 	default:
 		require.Fail(t, "unknown ip version", c.IpVersion)
 	}