[OSDOCS-17515]: Adding TP statement to HCP on IBM Z disconnected

Author: lahinson

hosted_control_planes/hcp-disconnected/disconnected-install-ibmz-hcp.adoc

@@ -6,6 +6,9 @@ include::_attributes/common-attributes.adoc[]
 
 toc::[]
 
+:FeatureName: {hcp} on {ibm-z-title} in a disconnected environment
+include::snippets/technology-preview.adoc[]
+
 {hcp-capital} deployments in disconnected environments function differently than in a standalone {product-title}.
 
 {hcp-capital} involves two distinct environments: