[lworld] RFR: 8281323: [lworld] Unnecessary entries in Preload attribute

[Srikanth Adayapalam]

Reimplement generation of Preload attribute decoupling it from InnerClasses attribute generation to minimize/eliminate needless entries from the Preload list

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Commit messages:
 - Fix white space errors
 - 8281323:  Unnecessary entries in Preload attribute

Changes: https://git.openjdk.java.net/valhalla/pull/656/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=656&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281323
  Stats: 342 lines in 8 files changed: 268 ins; 46 del; 28 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/656.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/656/head:pull/656

PR: https://git.openjdk.java.net/valhalla/pull/656