[lworld] RFR: 8376045: [lworld] Treat @NullRestricted fields as ACC_STRICT_INIT on load

[Chen Liang]

Automatically inject strict for NR annotations, and remove tests that previously kept them separate.

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Commit messages:
 - 8376045: [lworld] Treat @NullRestricted fields as ACC_STRICT_INIT on load

Changes: https://git.openjdk.org/valhalla/pull/1951/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1951&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376045
  Stats: 73 lines in 2 files changed: 0 ins; 68 del; 5 mod
  Patch: https://git.openjdk.org/valhalla/pull/1951.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1951/head:pull/1951

PR: https://git.openjdk.org/valhalla/pull/1951