8310380: Handle problems in core-related tests on macOS when codesign tool does not work
------------- Commit messages: - Backport 39c104df44f17c1d65e35becd4272f73e2c6610c Changes: https://git.openjdk.org/jdk21/pull/87/files Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=87&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8310380 Stats: 56 lines in 4 files changed: 37 ins; 12 del; 7 mod Patch: https://git.openjdk.org/jdk21/pull/87.diff Fetch: git fetch https://git.openjdk.org/jdk21.git pull/87/head:pull/87 PR: https://git.openjdk.org/jdk21/pull/87
