RFR: 8307125: compiler/jvmci/compilerToVM/MaterializeVirtualObjectTest.java hits assert(!Continuation::is_frame_in_continuation(thread(), fr())) failed: No support for deferred values in continuations

[Doug Simon]

This PRs adds JVMCI API to reflect that fact that deferred locals are not supported on virtual threads.

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Commit messages:
 - materializing frames on virtual threads is not supported

Changes: https://git.openjdk.org/jdk/pull/13777/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13777&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307125
  Stats: 48 lines in 6 files changed: 39 ins; 6 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/13777.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13777/head:pull/13777

PR: https://git.openjdk.org/jdk/pull/13777