RFR: 8262271: SA: Add new stress test that tests getting the stack trace of an active thread [v2]

[Chris Plummer]

On Tue, 16 Mar 2021 07:07:19 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>  How did you verify it is stable on all platforms?

I did 100s of runs on all our platforms with both product and debug builds, and also with -Xcomp.

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PR: https://git.openjdk.java.net/jdk/pull/2720