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_create_--help.golden

@@ -1,6 +1,6 @@
 coder v0.0.0-devel
 
-USAGE:
+USAGE:
   coder create [flags] [name]
 
   Create a workspace
@@ -9,26 +9,26 @@ coder v0.0.0-devel
   
        $ coder create <username>/<workspace_name>
 
-OPTIONS:
-      --parameter string-array, $CODER_RICH_PARAMETER
+OPTIONS:
+      --parameter string-array, $CODER_RICH_PARAMETER
           Rich parameter value in the format "name=value".
 
-      --rich-parameter-file string, $CODER_RICH_PARAMETER_FILE
+      --rich-parameter-file string, $CODER_RICH_PARAMETER_FILE
           Specify a file path with values for rich parameters defined in the
           template.
 
-      --start-at string, $CODER_WORKSPACE_START_AT
+      --start-at string, $CODER_WORKSPACE_START_AT
           Specify the workspace autostart schedule. Check coder schedule start
           --help for the syntax.
 
-      --stop-after duration, $CODER_WORKSPACE_STOP_AFTER
+      --stop-after duration, $CODER_WORKSPACE_STOP_AFTER
           Specify a duration after which the workspace should shut down (e.g.
           8h).
 
-  -t, --template string, $CODER_TEMPLATE_NAME
+  -t, --template string, $CODER_TEMPLATE_NAME
           Specify a template name.
 
-  -y, --yes bool
+  -y, --yes bool
           Bypass prompts.
 
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