This PR changes `jdk.internal.vm.ci` such that it is loaded by the platform class loader instead of the boot class loader. This allows Native Image to load a version of JVMCI different than the version on top of which Native Image is running. This capability is demonstrated and tested by `LoadAlternativeJVMCI.java`.
------------- Commit messages: - load JVMCI with platform class loader Changes: https://git.openjdk.org/jdk/pull/17520/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17520&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8323832 Stats: 227 lines in 8 files changed: 219 ins; 1 del; 7 mod Patch: https://git.openjdk.org/jdk/pull/17520.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/17520/head:pull/17520 PR: https://git.openjdk.org/jdk/pull/17520
