RFR: 8370636: com/sun/jdi/TwoThreadsTest.java should wait for completion of all threads [v2]

[Leonid Mesnik]

> Test 
> com/sun/jdi/TwoThreadsTest.java 
> start new threads using DebuggeeWrapper.newThread()
> and exit immediately.
> 
> It is needed to jon() threads so test really works for virtual threads.
> 
> I looked on other threads that use DebuggeeWrapper.newThread(). Seems most of them already updated to join spawned threads.
> 
> Tested by running test on all platfrom with and wihtout virtual threads.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  fixed spelling

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/27982/files
  - new: https://git.openjdk.org/jdk/pull/27982/files/96b9e772..7e04205e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27982&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27982&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27982.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27982/head:pull/27982

PR: https://git.openjdk.org/jdk/pull/27982