[Skymeld] Runs exclusive tests as parallel when forced to do so.

This was a missing feature in Skymeld.

PiperOrigin-RevId: 505054867
Change-Id: If28a9756e881bd09f84d627cee67e02629f6ebcb
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/BuildDriverKey.java b/src/main/java/com/google/devtools/build/lib/skyframe/BuildDriverKey.java
index 6276d35..80a9da6 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/BuildDriverKey.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/BuildDriverKey.java
@@ -145,9 +145,19 @@
   }
 
   enum TestType {
-    NOT_TEST,
-    PARALLEL,
-    EXCLUSIVE,
-    EXCLUSIVE_IF_LOCAL
+    NOT_TEST("not-test"),
+    PARALLEL("parallel"),
+    EXCLUSIVE("exclusive"),
+    EXCLUSIVE_IF_LOCAL("exclusive-if-local");
+
+    private final String msg;
+
+    TestType(String msg) {
+      this.msg = msg;
+    }
+
+    public String getMsg() {
+      return msg;
+    }
   }
 }