JvmtiVTMSTransitionDisabler should support disabling one virtual thread transitions

Now the JvmtiVTMSTransitionDisabler mechanism supports disabling VTMS transitions for all virtual threads only. It should also support disabling transitions for any specific virtual thread as well. This will improve scalability of the JVMTI functions operating on target virtual threads as the functions can be executed concurrently without blocking each other execution when target virtual threads are different.