[lworld] RFR: 8375602: [lworld] Test verifiers should verify the equivalence of the objects if possible [v2]

[Quan Anh Mai]

> Hi,
> 
> There are numerous tests of which verifiers assert that the hash value of 2 objects are equal to verify that those objects are equal. As `acmp` has become more mature, this PR updates those to verify that 2 objects are equal. This is more straightforward and it produces a nicer debug message in case of failures. I changed the order of some asserts that are changed or nearby. This is because the argument order of assert is `(expected, actual)`, and the assertion message would be `expected: ..., but was: ...`, so changing the order to the correct one gives us a more intuitive message.
> 
> A side effect of this PR is that it helps reproduce [JDK-8372824](https://bugs.openjdk.org/browse/JDK-8372824) in a consistent manner with `-XX:+UnlockExperimentalVMOptions -XX:PerMethodSpecTrapLimit=0 -XX:PerMethodTrapLimit=0`.
> 
> Please take a look and leave your reviews, thanks a lot.

Quan Anh Mai has updated the pull request incrementally with one additional commit since the last revision:

  copyright year

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/1929/files
  - new: https://git.openjdk.org/valhalla/pull/1929/files/19bac703..674656de

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1929&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1929&range=00-01

  Stats: 8 lines in 8 files changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/valhalla/pull/1929.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1929/head:pull/1929

PR: https://git.openjdk.org/valhalla/pull/1929