RFR: Merge jdk

[Mikael Vidstedt]

Merge in jdk-18+27

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Commit messages:
 - Merge jdk
 - 8269258: java/net/httpclient/ManyRequestsLegacy.java failed with connection timeout
 - 8278346: java/nio/file/Files/probeContentType/Basic.java fails on Linux SLES15 machine
 - 8278336: Use int64_t to represent byte quantities consistently in JfrObjectAllocationSample
 - 8278309: [windows] use of uninitialized OSThread::_state
 - 8278158: jwebserver should set request timeout
 - 8262341: Refine identical code in AddI/LNode.
 - 8276964: Better indicate a snippet that could not be processed
 - 8277992: Add fast jdk_svc subtests to jdk:tier3
 - 8278379: Zero VM is broken due to UseRTMForStackLocks was not declared after JDK-8276901
 - ... and 389 more: https://git.openjdk.java.net/portola/compare/de098e05...ed4f2d7d

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.java.net/?repo=portola&pr=37&range=00.0
 - jdk: https://webrevs.openjdk.java.net/?repo=portola&pr=37&range=00.1

Changes: https://git.openjdk.java.net/portola/pull/37/files
  Stats: 82901 lines in 1769 files changed: 55399 ins; 14564 del; 12938 mod
  Patch: https://git.openjdk.java.net/portola/pull/37.diff
  Fetch: git fetch https://git.openjdk.java.net/portola pull/37/head:pull/37

PR: https://git.openjdk.java.net/portola/pull/37