RFR: 8304839: Move TestScaffold.main() to the separate class DebugeeWrapper

[Alex Menkov]

On Thu, 21 Sep 2023 21:58:15 GMT, Leonid Mesnik <lmesnik at openjdk.org> wrote:

> The code related to virtual threads support is moved into a separate class DebugeeWrapper.
> 
> The code of method main() remains the same. I don't mix code change with moving code between files.
> 
> Tesed by running 
> make run-test JTREG_RETAIN=all  TEST=com/sun/jdi
> make run-test JTREG_RETAIN=all  JTREG_TEST_THREAD_FACTORY=Virtual TEST=com/sun/jdi
> locally and tier1 and hs-tier5 in Mach5 CI

Marked as reviewed by amenkov (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/15874#pullrequestreview-1640507659