perf(cli): optimize CPU consumption of help pages (#9607)

This change reduces the CPU consumption of --help by ~50%.

Also, this change removes ANSI escape codes from our golden files. I
don't think those were worth the inability to parallelize golden file tests and
global state fragility.

cli/testdata/coder_delete_--help.golden

@@ -1,19 +1,19 @@
 coder v0.0.0-devel
 
-USAGE:
+USAGE:
   coder delete [flags] <workspace>
 
   Delete a workspace
 
   Aliases: rm
 
-OPTIONS:
-      --orphan bool
+OPTIONS:
+      --orphan bool
           Delete a workspace without deleting its resources. This can delete a
           workspace in a broken state, but may also lead to unaccounted cloud
           resources.
 
-  -y, --yes bool
+  -y, --yes bool
           Bypass prompts.
 
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