Merge pull request #68899 from mletalie/OSDOCS-8251

[OSDOCS-8251]Add note to ROSA HCP docs that specify enforced AWS managed policies for HCP clusters

Author: EricPonvelle

modules/rosa-hcp-creating-account-wide-sts-roles-and-policies.adoc

@@ -5,6 +5,11 @@
 
 Before using the {product-title} (ROSA) CLI, `rosa`, to create {hcp-title-first} clusters, create the required account-wide roles and policies, including the Operator policies.
 
+[NOTE]
+====
+{hcp-title} clusters require account and operator roles with AWS managed policies attached. Customer managed policies are not supported. For more information regarding AWS managed policies for {hcp-title} clusters, see link:https://docs.aws.amazon.com/ROSA/latest/userguide/security-iam-awsmanpol-account-policies.html[AWS managed policies for ROSA account roles].
+====
+
 .Prerequisites
 
 * You have completed the AWS prerequisites for {hcp-title}.
@@ -20,5 +25,4 @@ Before using the {product-title} (ROSA) CLI, `rosa`, to create {hcp-title-first}
 [source,terminal]
 ----
 $ rosa create account-roles --hosted-cp
-----
-For more information regarding AWS managed IAM policies for ROSA, see link:https://docs.aws.amazon.com/ROSA/latest/userguide/security-iam-awsmanpol.html[AWS managed IAM policies for ROSA].
+----