[lworld] RFR: 8366267: [lworld] Injected ACC_IDENTITY escapes to instrumentation of older classes

[Coleen Phillimore]

This is a simple fix to mask off the ACC_IDENTITY bit from the inner class attribute that was added in during classfile parsing for non-preview non-value classfiles.
Tested with tier1 and java/lang/instrument manually.

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Commit messages:
 - 8366267: [lworld] Injected ACC_IDENTITY escapes to instrumentation of older classes

Changes: https://git.openjdk.org/valhalla/pull/1547/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1547&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366267
  Stats: 13 lines in 4 files changed: 11 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1547.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1547/head:pull/1547

PR: https://git.openjdk.org/valhalla/pull/1547