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.

provisionersdk/session.go

@@ -234,7 +234,7 @@ func (s *Session) extractArchive() error {
 		// Always check for context cancellation before reading the next header.
 		// This is mainly important for unit tests, since a canceled context means
 		// the underlying directory is going to be deleted. There still exists
-		// the small race condition that the context is cancelled after this, and
+		// the small race condition that the context is canceled after this, and
 		// before the disk write.
 		if ctx.Err() != nil {
 			return xerrors.Errorf("context canceled: %w", ctx.Err())