RFR: 8253169: [BACKOUT] Improve large object handling during evacuation

[Kim Barrett]

Revert "8027545: Improve object array chunking test in G1's copy_to_survivor_space"
Revert "8158045: Improve large object handling during evacuation"
Revert "8027761: Investigate fast-path for scanning only objects with references during gc"

This reverts commit dafcf1056f5cb1772eb61fca9ee46fe24c83fc09.

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Commit messages:
 - Revert "8027545: Improve object array chunking test in G1's copy_to_survivor_space"

Changes: https://git.openjdk.java.net/jdk/pull/181/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=181&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253169
  Stats: 467 lines in 8 files changed: 28 ins; 405 del; 34 mod
  Patch: https://git.openjdk.java.net/jdk/pull/181.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/181/head:pull/181

PR: https://git.openjdk.java.net/jdk/pull/181