[lworld] RFR: 8286491: Withdraw ValueObject and IdentityObject and introduce value and identity class modifiers [v7]

[Srikanth Adayapalam]

> Changes to javac, hotspot runtime, core libs and asmtools sources and tests

Srikanth Adayapalam has updated the pull request incrementally with two additional commits since the last revision:

 - Fix typo spotted in code review
 - Fix tier1 langtools test failure: tools/javac/diags/CheckExamples.java

-------------

Changes:
  - all: https://git.openjdk.java.net/valhalla/pull/688/files
  - new: https://git.openjdk.java.net/valhalla/pull/688/files/c281f18e..34ce4398

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=688&range=06
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=688&range=05-06

  Stats: 167 lines in 12 files changed: 101 ins; 61 del; 5 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/688.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/688/head:pull/688

PR: https://git.openjdk.java.net/valhalla/pull/688