Obsolete unused UseOprofile flag on BSD

Summary

Obsolete the unused UseOprofile flag.

Problem

The UseOprofile flag was copied from Linux when the macOS port was done, but is actually unused on macOS/BSD.

Solution

Obsolete the UseOprofile flag in JDK 16 and expire it in JDK 17.

Specification

Remove the flag definition from src/hotspot/os/bsd/globals_bsd.hpp:

-  product(bool, UseOprofile, false                                                       \
-          "enable support for Oprofile profiler")                                        \

Add the flag to the obsoletion section of the special flag table:

+  { "UseOprofile",          JDK_Version::undefined(), JDK_Version::jdk(16), JDK_Version::jdk(17) },