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_templates_push_--help.golden

@@ -1,50 +1,50 @@
 coder v0.0.0-devel
 
-USAGE:
+USAGE:
   coder templates push [flags] [template]
 
   Push a new template version from the current directory or as specified by flag
 
-OPTIONS:
-      --activate bool (default: true)
+OPTIONS:
+      --activate bool (default: true)
           Whether the new template will be marked active.
 
-      --always-prompt bool
+      --always-prompt bool
           Always prompt all parameters. Does not pull parameter values from
           active template version.
 
-      --create bool (default: false)
+      --create bool (default: false)
           Create the template if it does not exist.
 
-  -d, --directory string (default: .)
+  -d, --directory string (default: .)
           Specify the directory to create from, use '-' to read tar from stdin.
 
-      --ignore-lockfile bool (default: false)
+      --ignore-lockfile bool (default: false)
           Ignore warnings about not having a .terraform.lock.hcl file present in
           the template.
 
-  -m, --message string
+  -m, --message string
           Specify a message describing the changes in this version of the
           template. Messages longer than 72 characters will be displayed as
           truncated.
 
-      --name string
+      --name string
           Specify a name for the new template version. It will be automatically
           generated if not provided.
 
-      --provisioner-tag string-array
+      --provisioner-tag string-array
           Specify a set of tags to target provisioner daemons.
 
-      --var string-array
+      --var string-array
           Alias of --variable.
 
-      --variable string-array
+      --variable string-array
           Specify a set of values for Terraform-managed variables.
 
-      --variables-file string
+      --variables-file string
           Specify a file path with values for Terraform-managed variables.
 
-  -y, --yes bool
+  -y, --yes bool
           Bypass prompts.
 
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