Skip mirror tests more generally for $mode == product instead of $runtime == dart_product.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index a8623b4fa9208569e17ce2a5267bf4c6d55bd25d..400e82bea1fbf9cb11880dc17e762c26d5518fd8 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -348,11 +348,9 @@ async/dart2js_uncaught_error_test: Skip  # JS-integration only test
 [ $noopt && $arch == simarm64 ]
 async/slow_consumer2_test: Pass, RuntimeError # Issue 25726
 
-[ $noopt || $compiler == precompiler ]
+[ $noopt || $compiler == precompiler || $mode == product ]
 mirrors/*: SkipByDesign
+
+[ $noopt || $compiler == precompiler ]
 convert/chunked_conversion_utf88_test: Pass, Timeout
 convert/utf85_test: Pass, Timeout
-
-[ $runtime == vm && $mode == product ]
-mirrors/mirrors_reader_test: Fail,OK  # Expects exact type name.
-