RFR: 8373293: Change the exception handling in TestNestHostErrorWithMultiThread.java [v2]

[David Holmes]

> To prevent the failure mode seen in [JDK-8372988](https://bugs.openjdk.org/browse/JDK-8372988) we should prevent thread test threads from being terminated by uncaught exceptions, and allow the main thread to detect and throw all errors. That way we should see what the actual failure is.
> 
> Testing:
>  - tiers 1-4 (sanity)
> 
> Thanks

David Holmes has updated the pull request incrementally with one additional commit since the last revision:

  Reviewer suggestion

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28713/files
  - new: https://git.openjdk.org/jdk/pull/28713/files/3bfc2544..5c8f20e3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28713&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28713&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28713.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28713/head:pull/28713

PR: https://git.openjdk.org/jdk/pull/28713