RFR: 8347491: IllegalArgumentationException thrown by ThreadPoolExecutor doesn't have a useful message [v3]

[He-Pin (kerr)]

> Motivation:
> When a user passes a wrong parameter, the current implementation throws an IllegalArgumentException with an error message `null`, which is not helpful.
> 
> Modification:
> Add detail error messages.
> 
> Result:
> Helpful messages.

He-Pin(kerr) has updated the pull request incrementally with two additional commits since the last revision:

 - .
 - .

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23050/files
  - new: https://git.openjdk.org/jdk/pull/23050/files/dfc2cee7..1e098b28

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23050&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23050&range=01-02

  Stats: 85 lines in 2 files changed: 20 ins; 26 del; 39 mod
  Patch: https://git.openjdk.org/jdk/pull/23050.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23050/head:pull/23050

PR: https://git.openjdk.org/jdk/pull/23050