RFR: Merge jdk8u:master

[Andrew John Hughes]

Merge jdk8u342-b04

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Commit messages:
 - Merge jdk8u342-b04
 - 8031567: Better model for storing source revision information
 - 8202142: jfr/event/io/TestInstrumentation is unstable
 - 8266187: Memory leak in appendBootClassPath()
 - 8283350: (tz) Update Timezone Data to 2022a
 - 8286989: Build failure on macOS after 8281814
 - 8285727: [11u, 17u] Unify fix for JDK-8284920 with version from head
 - 8284620: CodeBuffer may leak _overflow_arena
 - 8285523: Improve test java/io/FileOutputStream/OpenNUL.java

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/shenandoah-jdk8u/pull/18/files
  Stats: 1036 lines in 44 files changed: 525 ins; 84 del; 427 mod
  Patch: https://git.openjdk.org/shenandoah-jdk8u/pull/18.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk8u.git pull/18/head:pull/18

PR: https://git.openjdk.org/shenandoah-jdk8u/pull/18