Move ArtGtestsTarget to general-tests.

The size limiting bug in tradefed has been fixed.
general-tests is more appropriate target since do
not do any device-specific testing.

Tag the ART tests so they can be run from ATP.

Bug: 147817606
Test: atest ArtGtestsTarget --rebuild-module-info -c
Change-Id: Idd5f65608a51a1b145e826c2056032acdfed9b6a
diff --git a/test/Android.bp b/test/Android.bp
index 769f39f..b0813db 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -943,7 +943,7 @@
         ":com.android.art.testing",
         ":art-gtest-jars",
     ],
-    test_suites: ["device-tests"],
+    test_suites: ["general-tests"],
     test_config: "gtests-target.xml",
 }
 
diff --git a/test/gtests-target.xml b/test/gtests-target.xml
index 7152835..62aa938 100644
--- a/test/gtests-target.xml
+++ b/test/gtests-target.xml
@@ -14,6 +14,7 @@
      limitations under the License.
 -->
 <configuration description="ART gtests">
+    <option name="test-suite-tag" value="art" />
     <target_preparer class="com.android.tradefed.targetprep.InstallApexModuleTargetPreparer" >
         <option name="test-file-name" value="com.android.art.testing.apex" />
     </target_preparer>