RFR: 8306581: JVMCI tests failed when run with -XX:TypeProfileLevel=222 after JDK-8303431

[Doug Simon]

This PR fixes an issue where an `Object[]` value is allocated in the VM and passed to a parameter of type `Class[]`.

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Commit messages:
 - fix type punning bug in upcall to VMSupport::encodeAnnotations

Changes: https://git.openjdk.org/jdk/pull/13566/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13566&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306581
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13566.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13566/head:pull/13566

PR: https://git.openjdk.org/jdk/pull/13566