Summary
-------

Obsolete the unused `AssertOnSuspendWaitFailure` and `TraceSuspendWaitFailures` flags

Problem
-------

The `AssertOnSuspendWaitFailure` and `TraceSuspendWaitFailures` flags became unused in JDK16 and should have been obsoleted at the time.

Solution
--------

Obsolete the flags now so that their use will generate a warning.

Specification
-------------

    > +++ b/src/hotspot/share/runtime/arguments.cpp 
       >      // -------------- Obsolete Flags - sorted by expired_in --------------
    > +  { "AssertOnSuspendWaitFailure",   JDK_Version::undefined(), JDK_Version::jdk(17), JDK_Version::jdk(18) },
    > +  { "TraceSuspendWaitFailures",     JDK_Version::undefined(), JDK_Version::jdk(17), JDK_Version::jdk(18) },  
   
    > +++ b/src/hotspot/share/runtime/globals.hpp 
    > -  product(bool, AssertOnSuspendWaitFailure, false,                          \
    > -          "Assert/Guarantee on external suspend wait failure")              \
    > -                                                                            \
    > -  product(bool, TraceSuspendWaitFailures, false,                            \
    > -          "Trace external suspend wait failures")                           \