Change default rocprof to rocprofv3 (#748)

* Revert of https://github.com/ROCm/rocprofiler-compute/pull/738

* Change default rocprof backend interface to rocprofv3

* Add MI 350 support in documentation

* Added known issue that MI 100 profiling will not work unless rocprofv1
  is explicitly opted in

* Remove MI 50 soc gfx python class since MI 50 is not supported

[ROCm/rocprofiler-compute commit: d27ee69b52]

projects/rocprofiler-compute/src/utils/utils.py

@@ -323,7 +323,7 @@ def detect_rocprof(args):
     # detect rocprof
     if not "ROCPROF" in os.environ.keys():
         # default rocprof
-        rocprof_cmd = "rocprof"
+        rocprof_cmd = "rocprofv3"
     else:
         rocprof_cmd = os.environ["ROCPROF"]