[OCPBUGS-46004]: Various HCP doc improvements

Author: lahinson

modules/hcp-aws-enable-private-link.adoc

@@ -15,7 +15,7 @@ To provision {hcp} on the {aws-first} with PrivateLink, enable {aws-short} Priva
 . See the following table to confirm that the secret contains the required fields:
 
 .Required fields for the {aws-short} secret
-[cols="3,3",options="header"]
+[options="header"]
 |===
 | Field name | Description | Optional or required
 | `region`

modules/hcp-aws-set-up-ext-dns.adoc

@@ -13,7 +13,7 @@ You can provision {hcp} with external DNS or service-level DNS.
 . See the following table to verify that the secret has the required fields:
 +
 .Required fields for the {aws-short} secret
-[cols="3,3",options="header"]
+[options="header"]
 |===
 | Field name | Description | Optional or required
 

modules/hcp-bm-hc.adoc

@@ -56,7 +56,7 @@ $ hcp create cluster agent \
 <6> Specify the etcd storage class name, for example, `lvm-storageclass`.
 <7> Specify the path to your SSH public key. The default file path is `~/.ssh/id_rsa.pub`.
 <8> Specify your hosted cluster namespace.
-<9> The default value for the control plane availability policy is `HighlyAvailable`.
+<9> Specify the availability policy for the hosted control plane components. Supported options are `SingleReplica` and `HighlyAvailable`. The default value is `HighlyAvailable`.
 <10> Specify the supported {product-title} version that you want to use, for example, `4.17.0-multi`. If you are using a disconnected environment, replace `<ocp_release_image>` with the digest image. To extract the {product-title} release image digest, see _Extracting the {product-title} release image digest_.
 
 +

modules/hcp-non-bm-hc.adoc

@@ -52,7 +52,7 @@ $ hcp create cluster agent \
 <6> Verify that you have a default storage class configured for your cluster. Otherwise, you might end up with pending PVCs. Specify the etcd storage class name, for example, `lvm-storageclass`.
 <7> Specify the path to your SSH public key. The default file path is `~/.ssh/id_rsa.pub`.
 <8> Specify your hosted cluster namespace.
-<9> The default value for the control plane availability policy is `HighlyAvailable`.
+<9> Specify the availability policy for the hosted control plane components. Supported options are `SingleReplica` and `HighlyAvailable`. The default value is `HighlyAvailable`.
 <10> Specify the supported {product-title} version that you want to use, for example, `4.17.0-multi`.
 
 .Verification