Rollup merge of #76741 - Mark-Simulacrum:no-dry-run-timing, r=alexcrichton

Avoid printing dry run timings

This avoids a wall of text on CI with 0.000 as the likely time.

r? @alexcrichton

src/bootstrap/builder.rs

@@ -1394,7 +1394,7 @@ impl<'a> Builder<'a> {
             (out, dur - deps)
         };
 
-        if self.config.print_step_timings {
+        if self.config.print_step_timings && !self.config.dry_run {
             println!("[TIMING] {:?} -- {}.{:03}", step, dur.as_secs(), dur.subsec_millis());
         }