[stable][testing] Support vm-aot configurations

"vm-aot" is more user friendly than dart_precompiled-dartkp. But, "vm"
implied --runtime="vm" which is incompatible with --compiler="dartkp".

Cherry-pick: https://dart-review.googlesource.com/c/sdk/+/280094
Change-Id: Ia6d0e951818e17cc518a550d7ea9c93f21ddc8c0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/289500
Reviewed-by: William Hesse <whesse@google.com>

pkg/smith/lib/configuration.dart

@@ -115,6 +115,11 @@ class Configuration {
 
     // Infer option values from the words in the configuration name.
     var words = name.split("-").toSet();
+    // "vm-aot" -> "dart_precompiled-aot"
+    if (words.contains("aot")) {
+      words.remove("vm");
+      words.add("dart_precompiled");
+    }
     var optionsCopy = Map.of(optionsJson);
 
     T? enumOption<T extends NamedEnum>(

pkg/test_runner/test/options_test.dart

@@ -68,6 +68,12 @@ void testOptions() {
         ['-n', 'valid-dart2js-chrome,valid-dart2js-safari', '--no-batch'],
         configuration.reproducingArguments);
   }
+
+  // Allow vm-aot
+  configurations = parseConfigurations(['-nvm-aot']);
+  Expect.equals(1, configurations.length);
+  Expect.equals("dart_precompiled", configurations.first.runtime.name);
+  Expect.equals("dartkp", configurations.first.compiler.name);
 }
 
 void testValidation() {