[lworld] RFR: 8324792: [lworld] remove VarHandle test cases for primitive value class

[Mandy Chung]

Clean up test/jdk/java/lang/invoke/VarHandles tests and remove tests for primitive value classes.   Since `.class` is adequate to refer to the type, the template files are now updated to match the mainline with only small change for valhalla.

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Commit messages:
 - update copyright header
 - 8324792: [lworld] remove VarHandle test cases for primitive value class

Changes: https://git.openjdk.org/valhalla/pull/979/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=979&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324792
  Stats: 6767 lines in 40 files changed: 23 ins; 4416 del; 2328 mod
  Patch: https://git.openjdk.org/valhalla/pull/979.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/979/head:pull/979

PR: https://git.openjdk.org/valhalla/pull/979