RFR: 8321219: runtime/jni/FastGetField: assert(is_interpreted_frame()) failed: interpreted frame expected

[Serguei Spitsyn]

The fix is for a regression caused by:
 [8308614](https://bugs.openjdk.org/browse/JDK-8308614) Enabling JVMTI ClassLoad event slows down vthread creation by factor 10

The fix of 8308614 just triggered a known issue:
  [8316283](https://bugs.openjdk.org/browse/JDK-8316283) field watch events are not always posted with -Xcomp option
  
The fix is just a work around with the extra checks of the `JvmtiExport::should_post_field_access()` and `JvmtiExport::should_post_field_modification()`.

Testing:
- In progress: Test with tiers 1-6

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Commit messages:
 - 8321219: runtime/jni/FastGetField: assert(is_interpreted_frame()) failed: interpreted frame expected

Changes: https://git.openjdk.org/jdk/pull/16961/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16961&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321219
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16961.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16961/head:pull/16961

PR: https://git.openjdk.org/jdk/pull/16961