[lworld] RFR: 8373806: [lworld] Disable preview patching by default [v3]

[David Beaumont]

> Flip the 3 places where the PREVIEW_PATCHING_DEFAULT property default is defined.
> 
> This will enable the JRT file-system preview mode code for *almost* all tests and code by default.
> A few tests still set the property explicitly to false, but everything else should now no longer be using preview patching.

David Beaumont has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 14 commits:

 - Merge branch 'plumbing' into flip_default
 - Merge branch 'lworld' into plumbing
 - flip default property value
 - Merge branch 'lworld' into plumbing
 - correct assertion
 - review feedback
 - remove automatic formatting
 - comments
 - Remove note about StableValue (not possible)
 - Use byte array not stream for simplicity
 - ... and 4 more: https://git.openjdk.org/valhalla/compare/7bcb2999...e7924de7

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Changes: https://git.openjdk.org/valhalla/pull/1806/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1806&range=02
  Stats: 3 lines in 3 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1806.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1806/head:pull/1806

PR: https://git.openjdk.org/valhalla/pull/1806