OSDOCS-11789 ROSA HCP/Classic split: Prepare your environment

- Including changes from OSDOCS-11640 by cherry-picking in 16db23b
- Rebased against main following merge of rosa_hcp_migration branch
- Corrected missing 500 node max support limit
- Applied peer and merge review feedback

Squashed:
1 - Intial commit for the ROSA with HCP branch
2 - Adding the Upgrading HCP cherrypick
3 - Adding the Security HCP cherrypick
4 - Upgrading ROSA with HCP updates
5 - Updated the HCP migration to include the ROSA Tutorals and Learning sections
6 - Updated the HCP migration to add the rest of the books from the password protected preview
7 - Repaired the links in Introduction to ROSA book

8 - classic to hcp migration topic maps update
commented in the end of section in topic map
applied QE suggestions from gdoc
applied more QE suggestions from gdoc
applied conditions for new hcp distro to assemblies and modules
fixed typo on line 13 of configuring registry operator
replaced namespace as suggested by QE
removed operator pod list
removed space in rosa topic maps
removed spacing in line 39 of checking status of pods

Author: EricPonvelle

_topic_maps/_topic_map_rosa.yml

@@ -77,7 +77,7 @@ Topics:
 # - Name: About admission plugins
 #   File: rosa-admission-plug-ins
 #   Distros: openshift-rosa
-- Name: About IAM resources for ROSA with STS
+- Name: About IAM resources for STS clusters
   File: rosa-sts-about-iam-resources
 - Name: OpenID Connect Overview
   File: rosa-oidc-overview
@@ -240,7 +240,7 @@ Topics:
   File: rosa-limits-scalability
 - Name: ROSA with HCP limits and scalability
   File: rosa-hcp-limits-scalability
-- Name: Planning your environment
+- Name: Planning resource usage in your cluster
   File: rosa-planning-environment
 - Name: Required AWS service quotas
   File: rosa-sts-required-aws-service-quotas
@@ -897,8 +897,6 @@ Topics:
   File: configuring-registry-operator
 - Name: Accessing the registry
   File: accessing-the-registry
-# - Name: Exposing the registry
-#   File: securing-exposing-registry
 ---
 Name: Operators
 Dir: operators