[lworld] RFR: 8321293: [lworld] First batch of migrated runtime tests

[Frederic Parain]

First batch of migrated runtime tests.

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Commit messages:
 - Migrate tests from using primitive classes to annotated value classes

Changes: https://git.openjdk.org/valhalla/pull/959/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=959&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321293
  Stats: 1136 lines in 32 files changed: 533 ins; 392 del; 211 mod
  Patch: https://git.openjdk.org/valhalla/pull/959.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/959/head:pull/959

PR: https://git.openjdk.org/valhalla/pull/959