[jdk21u-dev] RFR: 8362207: Add more test cases for possible double-rounding in fma

[Goetz Lindenmaier]

I backport this for parity with 21.0.10-oracle.

Omitted b/test/jdk/jdk/incubator/vector/BasicFloat16ArithTests.java
which was added by https://bugs.openjdk.org/browse/JDK-8341260 Add Float16 to jdk.incubator.vector

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Commit messages:
 - backport 6e368e0c696bc9b2118014937aa2e091ea662985

Changes: https://git.openjdk.org/jdk21u-dev/pull/2240/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2240&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8362207
  Stats: 5 lines in 1 file changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2240.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2240/head:pull/2240

PR: https://git.openjdk.org/jdk21u-dev/pull/2240