RFR: 8325438: Add exhaustive tests for Math.round intrinsics [v14]

[Hamlin Li]

> HI,
> Can you have a look at this patch adding some tests for Math.round instrinsics?
> Thanks!
> 
> ### FYI:
> During the development of RoundVF/RoundF, we faced the issues which were only spotted by running test exhaustively against 32/64 bits range of int/long.
> It's helpful to add these exhaustive tests in jdk for future possible usage, rather than build it everytime when needed.
> Of course, we need to put it in `manual` mode, so it's not run when `-automatic` jtreg option is specified which I guess is the mode CI used, please correct me if I'm assume incorrectly.

Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:

  misc fixes

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17753/files
  - new: https://git.openjdk.org/jdk/pull/17753/files/b5207436..7c2ef4fb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17753&range=13
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17753&range=12-13

  Stats: 251 lines in 5 files changed: 107 ins; 131 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/17753.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17753/head:pull/17753

PR: https://git.openjdk.org/jdk/pull/17753