fix: update broken xrefs in transformer and LDAP procedures

Custom transformer prerequisites referenced old monolithic procedure
IDs. LDAP procedure referenced RHBK auth with {parent-context} which
no longer resolves correctly after the assembly restructure. Hardcode
the correct target contexts for cross-assembly xrefs.

Author: themr0c

modules/shared/proc-create-a-custom-transformer-to-provision-users-from-github-to-the-software-catalog.adoc

@@ -8,7 +8,7 @@ Customize how {product} provisions users and groups to {product-short} software
 by creating a backend module plugin that uses the `githubOrgEntityProviderTransformsExtensionPoint` to offer custom user and group transformers for the GitHub backend.
 
 .Prerequisites
-* You have xref:enable-user-authentication-with-github-with-optional-steps_{context}[enabled provisioning users from GitHub to the software catalog].
+* You have xref:import-users-and-groups-from-github_{context}[imported users and groups from GitHub to the software catalog].
 
 .Procedure
 . Create a new backend module:

modules/shared/proc-create-a-custom-transformer-to-provision-users-from-gitlab-to-the-software-catalog.adoc

@@ -8,7 +8,7 @@ Customize how {product} provisions users and groups to {product-short} software
 by creating a backend module plugin that uses the `gitlabOrgEntityProviderTransformsExtensionPoint` to offer custom user and group transformers for the GitLab backend.
 
 .Prerequisites
-* You have xref:enable-user-authentication-with-gitlab_{context}[enabled provisioning users from GitLab to the software catalog].
+* You have xref:import-users-and-groups-from-gitlab_{context}[imported users and groups from GitLab to the software catalog].
 
 .Procedure
 . Create a new backend module:

modules/shared/proc-create-a-custom-transformer-to-provision-users-from-rhbk-to-the-software-catalog.adoc

@@ -8,7 +8,7 @@ Customize how {product} provisions users and groups to {product-short} software
 by creating a backend module that uses the `keycloakTransformerExtensionPoint` to offer custom user and group transformers for the Keycloak backend.
 
 .Prerequisites
-* You have xref:enable-user-authentication-with-rhbk-with-optional-steps_{context}[enabled provisioning users from {rhbk-brand-name} ({rhbk}) to the software catalog].
+* You have xref:import-users-and-groups-from-rhbk_{context}[imported users and groups from {rhbk-brand-name} ({rhbk}) to the software catalog].
 
 .Procedure
 . Create a new backend module with the `yarn new` command.