RFR: Merge jdk8u:master

[Andrew John Hughes]

Merge jdk8u452-b04

GHA builds will not work until [JDK-8293107](https://bugs.openjdk.org/browse/JDK-8293107) is merged in 8u462-b01

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Commit messages:
 - Merge jdk8u452-b04
 - 8350816: [8u] Update TzdbZoneRulesCompiler to ignore HST/EST/MST links
 - 8285756: clean up use of bad arguments for `@clean` in langtools tests
 - 8340552: Harden TzdbZoneRulesCompiler against missing zone names
 - 8261020: Wrong format parameter in create_emergency_chunk_path
 - 8346140: [8u] tools/jar/ExtractFilesTest.java and tools/jar/MultipleManifestTest.java fails with jtreg5.1
 - 8340660: [8u] Test com/sun/jdi/PrivateTransportTest.sh fails on MacOS
 - 8244966: Add .vscode to .hgignore and .gitignore
 - 8348211: [8u] sun/management/jmxremote/startstop/JMXStartStopTest.java fails after backport of JDK-8066708

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

Changes: https://git.openjdk.org/shenandoah-jdk8u/pull/93/files
  Stats: 67 lines in 9 files changed: 13 ins; 18 del; 36 mod
  Patch: https://git.openjdk.org/shenandoah-jdk8u/pull/93.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk8u.git pull/93/head:pull/93

PR: https://git.openjdk.org/shenandoah-jdk8u/pull/93