SWDEV-301667 - Create TS for each node recorded in graph

- Create a vector to allow multiple TS to be stored in Command.
- This would mean we dont wait for entire batch in Accumulate command
to finish when we exhaust signals.
- Reduce the number of signals created at init to 64. This min value
may still need to be tuned but the KFD allows max of 4094 interrupt
signals per device.
- Store kernel names whenever they are available and not just when
profiling. If we dynamically enable profiling like for Torch, a crash
can happen if hipGraphInstantiate wasnt included in Torch profile scope
beacuse we previously entered kernel names only when profiler is
attached.

Change-Id: I34e7881a25bbc763f82fdeb3408a8ea58e1ec006

rocclr/platform/command.cpp

@@ -317,7 +317,6 @@ Command::Command(HostQueue& queue, cl_command_type type, const EventWaitList& ev
       queue_(&queue),
       next_(nullptr),
       type_(type),
-      data_(nullptr),
       waitingEvent_(waitingEvent),
       eventWaitList_(eventWaitList),
       commandWaitBits_(commandWaitBits) {