[jdk21u-dev] RFR: 8316756: C2 EA fails with "missing memory path" when encountering unsafe_arraycopy stub call

[Martin Doerr]

Clean backport of [JDK-8316756](https://bugs.openjdk.org/browse/JDK-8316756).

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Commit messages:
 - Backport b89172149d6a900d11630a95be7278870421b435

Changes: https://git.openjdk.org/jdk21u-dev/pull/697/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=697&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316756
  Stats: 86 lines in 2 files changed: 85 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/697.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/697/head:pull/697

PR: https://git.openjdk.org/jdk21u-dev/pull/697