RFR: 8364004: Expose VMError::controlledCrash via Whitebox

[Thomas Stuefe]

Small addition to the circle of WhiteBox functions to allow more controlled crashes triggered from jtreg tests.

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Commit messages:
 - Update whitebox.cpp
 - JDK-8364004-Expose-VMError-controlledCrash-via-Whitebox

Changes: https://git.openjdk.org/jdk/pull/26472/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26472&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364004
  Stats: 29 lines in 3 files changed: 24 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/26472.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26472/head:pull/26472

PR: https://git.openjdk.org/jdk/pull/26472