RFR: Merge jdk17

[Jesper Wilhelmsson]

Forwardport JDK 17 -> JDK 18

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Commit messages:
 - Merge
 - 8067223: [TESTBUG] Rename Whitebox API package
 - 8271150: Remove EA from JDK 17 version string starting with Initial RC promotion on Aug 5, 2021(B34)

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.java.net/?repo=jdk&pr=4964&range=00.0
 - jdk17: https://webrevs.openjdk.java.net/?repo=jdk&pr=4964&range=00.1

Changes: https://git.openjdk.java.net/jdk/pull/4964/files
  Stats: 535 lines in 37 files changed: 449 ins; 1 del; 85 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4964.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4964/head:pull/4964

PR: https://git.openjdk.java.net/jdk/pull/4964