RFR: 8305351: C2 setScopedValueCache intrinsic doesn't use access API

[Erik Österlund]

The setScopedValueCache intrinsic for C2 doesn't use the access API. Instead, we store into an OopHandle with a raw store. That doesn't necessarily play well with all GCs, for example Shenandoah and generational ZGC. We should use the access API to ensure the right barriers are emitted.

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Commit messages:
 - 8305351: C2 setScopedValueCache intrinsic doesn't use access API

Changes: https://git.openjdk.org/jdk/pull/13324/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13324&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305351
  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13324.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13324/head:pull/13324

PR: https://git.openjdk.org/jdk/pull/13324