RFR: 8357979: [JVMCI] jdk.internal.vm.ci should have earlier class file version

[Doug Simon]

There are plans to have libgraal be built for JDK master using a version of Native Image running on a JDK one version behind JDK master. This Native Image execution needs to be able to load the JVMCI classes. As such, the JVMCI classes must have a class file major version of N-1 where N is the major class file version of JDK master.

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Commit messages:
 - use class file version one behind JDK master for JVMCI

Changes: https://git.openjdk.org/jdk/pull/25494/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25494&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357979
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25494.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25494/head:pull/25494

PR: https://git.openjdk.org/jdk/pull/25494