Enable Gencon/Balanced/OptAvgPause GC policy in testing

[fengxue-IS]

Signed-off-by: Jack Lu Jack.S.Lu@ibm.com

[fengxue-IS]

Per discussion with Lin, GC policy have been updated to support VirtualThread/Continuation
@LinHu2016 can you please review this

[LinHu2016]

LGTM

[pshipton]

Trying the test on a number of platforms
https://openj9-jenkins.osuosl.org/view/Test/job/Grinder/1330/

[pshipton]

A crash running balanced on most platforms. It didn't crash on AIX, and I didn't run xlinux.
https://openj9-jenkins.osuosl.org/job/Grinder/1331/tapResults/ - alinux
https://openj9-jenkins.osuosl.org/job/Grinder/1336/tapResults/ - plinux
https://openj9-jenkins.osuosl.org/job/Grinder/1332/consoleFull - windows
https://openj9-jenkins.osuosl.org/job/Grinder/1334/tapResults/ - amac
https://openj9-jenkins.osuosl.org/job/Grinder/1333/tapResults/ - xmac
https://openj9-jenkins.osuosl.org/job/Grinder/1337/console - zlinux

[pshipton]

A crash running balanced on most platforms, see the previous comment for details.

[dmitripivkine]

A crash running balanced on most platforms, see the previous comment for details.

Crash in Balanced and incomplete handling in Gencon
Fixing the problem in #16087

[babsingh]

Reopening, accidentally closed by #16087.

[fengxue-IS]

@LinHu2016 can you take another look please

[pshipton]

New grinder https://openj9-jenkins.osuosl.org/view/Test/job/Grinder/1374/

[pshipton]

I guess we need to wait until tomorrow, as the fix was just merged today and I'm using nightly builds for the testing.

[pshipton]

https://openj9-jenkins.osuosl.org/view/Test/job/Grinder/1383
Rebuild for xlinux to avoid centos6 - https://openj9-jenkins.osuosl.org/job/Grinder/1392/
Previous grinder passed. Run more iterations, 5x x 5 machines.
https://openj9-jenkins.osuosl.org/view/Test/job/Grinder/1393/ - infra issue on zlinux 2/5 machines, but otherwise it all passed.

[LinHu2016]

LGTM