Conditionalize links to Self-Managed topics

Author: JakeSCahill

modules/develop/partials/http-proxy.adoc

@@ -853,7 +853,12 @@ res = requests.delete(
 
 == Authenticate with HTTP Proxy
 
-HTTP Proxy supports authentication using SCRAM credentials or OIDC tokens. The authentication method depends on the xref:reference:properties/broker-properties.adoc#http_proxy_auth_method[`authentication_method`] broker property configuration and the cluster's xref:reference:properties/cluster-properties.adoc#http_authentication[`http_authentication`] settings.
+HTTP Proxy supports authentication using SCRAM credentials or OIDC tokens.
+The authentication method depends on
+ifndef::env-cloud[]
+the xref:reference:properties/broker-properties.adoc#http_proxy_auth_method[`authentication_method`] broker property and 
+endif::[]
+the cluster's xref:reference:properties/cluster-properties.adoc#http_authentication[`http_authentication`] settings.
 
 === SCRAM Authentication
 
@@ -943,7 +948,9 @@ pretty(res)
 --
 =====
 
+ifndef::env-cloud[]
 For details about configuring OIDC authentication, see xref:manage:security/authentication.adoc#oidc-http[OIDC Authentication].
+endif::[]
 
 == Use Swagger with HTTP Proxy