feat: add a per-template workspace rename setting (#27558)

cli/testdata/coder_server_--help.golden

@@ -17,13 +17,6 @@ SUBCOMMANDS:
                                 PostgreSQL deployment.
 
 OPTIONS:
-      --allow-workspace-renames bool, $CODER_ALLOW_WORKSPACE_RENAMES (default: false)
-          Allow users to rename their workspaces. WARNING: Renaming a workspace
-          can cause Terraform resources that depend on the workspace name to be
-          destroyed and recreated, potentially causing data loss. Only enable
-          this if your templates do not use workspace names in resource
-          identifiers, or if you understand the risks.
-
       --cache-dir string, $CODER_CACHE_DIRECTORY (default: [cache dir])
           The directory to cache temporary files. If unspecified and
           $CACHE_DIRECTORY is set, it will be used for compatibility with

cli/testdata/server-config.yaml.golden

@@ -635,10 +635,10 @@ userQuietHoursSchedule:
   # change their quiet hours schedule and the site default is always used.
   # (default: true, type: bool)
   allowCustomQuietHours: true
-# Allow users to rename their workspaces. WARNING: Renaming a workspace can cause
-# Terraform resources that depend on the workspace name to be destroyed and
-# recreated, potentially causing data loss. Only enable this if your templates do
-# not use workspace names in resource identifiers, or if you understand the risks.
+# Deprecated: use the per-template "Allow workspace renames" setting instead.
+# While set, it force-enables renames for every template in the deployment.
+# WARNING: Renaming a workspace can cause Terraform resources that depend on the
+# workspace name to be destroyed and recreated, potentially causing data loss.
 # (default: false, type: bool)
 allowWorkspaceRenames: false
 # Configure how emails are sent.