runtime/Thread/SuspendAtExit.java needs updating

java.lang.Thread.suspend() and java.lang.Thread.resume()
are deprecated for removal:

----------System.err:(13/1091)----------
/System/Volumes/Data/work/shared/bug_hunt/base_for_jdk17.git/open/test/hotspot/jtreg/runtime/Thread/SuspendAtExit.java:70: warning: [removal] suspend() in Thread has been deprecated and marked for removal
                    threads[i].suspend();
                              ^
/System/Volumes/Data/work/shared/bug_hunt/base_for_jdk17.git/open/test/hotspot/jtreg/runtime/Thread/SuspendAtExit.java:77: warning: [removal] resume() in Thread has been deprecated and marked for removal
                    threads[i].resume();
                              ^
/System/Volumes/Data/work/shared/bug_hunt/base_for_jdk17.git/open/test/hotspot/jtreg/runtime/Thread/SuspendAtExit.java:96: warning: [removal] suspend() in Thread has been deprecated and marked for removal
            threads[i].suspend();
                      ^
/System/Volumes/Data/work/shared/bug_hunt/base_for_jdk17.git/open/test/hotspot/jtreg/runtime/Thread/SuspendAtExit.java:97: warning: [removal] resume() in Thread has been deprecated and marked for removal
            threads[i].resume();
                      ^
4 warnings
result: Passed. Compilation successful

Will be switching java.lang.Thread.suspend() to JVM/TI SuspendThread() and
from java.lang.Thread.resume() to JVM/TI ResumeThread().

Also, the test should be switched from a counter based test to a
time based test since time based tests work better for stress kits.
Will also be cleaning up the error handling since the JVM/TI APIs
actually return error codes.