[lworld] RFR: 8328150: [lworld] Adjust flags to "--enable-preview" clear out EnableValhalla and EnablePrimitiveClasses

[David Simms]

* Removed all cases of -XX: EnableValhalla and EnablePrimitiveClasses
* Deleted tests that were dominated by now defunct concepts (withfield, entirely primitives classes etc)
* Trival fixes to simply remove primitive class tests cases
* `@ignores` tagged with bug number where tests need non-trival updating to JEP401 concepts

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Commit messages:
 - Misc cleanup
 - JDK tests
 - Lang/IO tests
 - Serviceability tests
 - Runtime tests
 - Merge branch 'lworld' into 8328150
 - Merge branch 'lworld' into 8328150
 - CDS tests
 - Compiler tests

Changes: https://git.openjdk.org/valhalla/pull/1052/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1052&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328150
  Stats: 4216 lines in 117 files changed: 44 ins; 3965 del; 207 mod
  Patch: https://git.openjdk.org/valhalla/pull/1052.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1052/head:pull/1052

PR: https://git.openjdk.org/valhalla/pull/1052