[jdk21u-dev] RFR: 8349637: Integer.numberOfLeadingZeros outputs incorrectly in certain cases

[Paul Hohensee]

Backport for parity with Oracle 21.0.8. Passes tier2 and the new test. Low risk, the test is exhaustive.

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Commit messages:
 - Backport 3657e92ead1e678942fcb272e77c3867eb5aa13e

Changes: https://git.openjdk.org/jdk21u-dev/pull/1584/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1584&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349637
  Stats: 223 lines in 3 files changed: 215 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1584.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1584/head:pull/1584

PR: https://git.openjdk.org/jdk21u-dev/pull/1584