jdk8 AIX jdk_security3_0 times out, but works typically with timeFactor:20

Ref: https://github.com/adoptium/aqa-tests/issues/4821#issuecomment-1786927083
jdk8 AIX jdk_security3_0 was made to pass with an openjdk jtreg timeourtFactor:20, should we perhaps default to that for AIX?
I suspect a number of other tests might be more reliable, but not a generally nice answer I know.....!

Start by reading the linked aqa-tests issue discussion and locating the AIX execution path for jdk_security3_0 and its jtreg timeout settings. Determine whether timeFactor:20 should be the AIX default, then validate the decision against jdk_security3_0 and any related tests that exhibit similar timeouts.

Written by the indexing model from the issue text.