RFR: 8279856: Parallel: Use PreservedMarks to record promotion-failed objects [v2]

[Albert Mingkun Yang]

> Simple change of using `PreservedMarks` to skip young-gen walking in finding promotion-failed objs.
> 
> Test: tier1-6

Albert Mingkun Yang has updated the pull request incrementally with two additional commits since the last revision:

 - review
 - review

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7028/files
  - new: https://git.openjdk.java.net/jdk/pull/7028/files/37979a3b..aee7f1b7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7028&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7028&range=00-01

  Stats: 13 lines in 3 files changed: 5 ins; 5 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7028.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7028/head:pull/7028

PR: https://git.openjdk.java.net/jdk/pull/7028