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_config-ssh_--help.golden

@@ -1,6 +1,6 @@
 coder v0.0.0-devel
 
-USAGE:
+USAGE:
   coder config-ssh [flags]
 
   Add an SSH Host entry for your workspaces "ssh coder.workspace"
@@ -15,40 +15,40 @@ coder v0.0.0-devel
   
        $ coder config-ssh --dry-run
 
-OPTIONS:
-      --coder-binary-path string, $CODER_SSH_CONFIG_BINARY_PATH
+OPTIONS:
+      --coder-binary-path string, $CODER_SSH_CONFIG_BINARY_PATH
           Optionally specify the absolute path to the coder binary used in
           ProxyCommand. By default, the binary invoking this command ('config
           ssh') is used.
 
-  -n, --dry-run bool, $CODER_SSH_DRY_RUN
+  -n, --dry-run bool, $CODER_SSH_DRY_RUN
           Perform a trial run with no changes made, showing a diff at the end.
 
-      --force-unix-filepaths bool, $CODER_CONFIGSSH_UNIX_FILEPATHS
+      --force-unix-filepaths bool, $CODER_CONFIGSSH_UNIX_FILEPATHS
           By default, 'config-ssh' uses the os path separator when writing the
           ssh config. This might be an issue in Windows machine that use a
           unix-like shell. This flag forces the use of unix file paths (the
           forward slash '/').
 
-      --ssh-config-file string, $CODER_SSH_CONFIG_FILE (default: ~/.ssh/config)
+      --ssh-config-file string, $CODER_SSH_CONFIG_FILE (default: ~/.ssh/config)
           Specifies the path to an SSH config.
 
-      --ssh-host-prefix string, $CODER_CONFIGSSH_SSH_HOST_PREFIX
+      --ssh-host-prefix string, $CODER_CONFIGSSH_SSH_HOST_PREFIX
           Override the default host prefix.
 
-  -o, --ssh-option string-array, $CODER_SSH_CONFIG_OPTS
+  -o, --ssh-option string-array, $CODER_SSH_CONFIG_OPTS
           Specifies additional SSH options to embed in each host stanza.
 
-      --use-previous-options bool, $CODER_SSH_USE_PREVIOUS_OPTIONS
+      --use-previous-options bool, $CODER_SSH_USE_PREVIOUS_OPTIONS
           Specifies whether or not to keep options from previous run of
           config-ssh.
 
-      --wait yes|no|auto, $CODER_CONFIGSSH_WAIT (default: auto)
+      --wait yes|no|auto, $CODER_CONFIGSSH_WAIT (default: auto)
           Specifies whether or not to wait for the startup script to finish
           executing. Auto means that the agent startup script behavior
           configured in the workspace template is used.
 
-  -y, --yes bool
+  -y, --yes bool
           Bypass prompts.
 
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