Add flag to optional run

Author: Tharazi97

TESTS/events/equeue/main.cpp

@@ -15,6 +15,10 @@
  * limitations under the License.
  */
 
+#ifndef MBED_EXTENDED_TESTS
+#error [NOT_SUPPORTED] When running on CI this test is disabled due to limiting testing time.
+#else
+
 #include "utest/utest.h"
 #include "unity/unity.h"
 #include "greentea-client/test_env.h"
@@ -1018,3 +1022,5 @@ int main()
 {
     Harness::run(specification);
 }
+
+#endif // MBED_EXTENDED_TESTS