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_list_--help.golden

@@ -1,25 +1,25 @@
 coder v0.0.0-devel
 
-USAGE:
+USAGE:
   coder list [flags]
 
   List workspaces
 
   Aliases: ls
 
-OPTIONS:
-  -a, --all bool
+OPTIONS:
+  -a, --all bool
           Specifies whether all workspaces will be listed or not.
 
-  -c, --column string-array (default: workspace,template,status,healthy,last built,outdated,starts at,stops after)
+  -c, --column string-array (default: workspace,template,status,healthy,last built,outdated,starts at,stops after)
           Columns to display in table output. Available columns: workspace,
           template, status, healthy, last built, outdated, starts at, stops
           after, daily cost.
 
-  -o, --output string (default: table)
+  -o, --output string (default: table)
           Output format. Available formats: table, json.
 
-      --search string (default: owner:me)
+      --search string (default: owner:me)
           Search for a workspace with a query.
 
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