RFR: 8294842: Pass actual pending cards to G1Policy::update_young_length_bounds during young gen revise [v3]

[Thomas Schatzl]

> Hi all,
> 
>   can I have reviews for this change that passes the actual amount of pending cards to `G1Policy::update_young_length_bounds` instead of some prediction during young gen revising?
> That improves predictions quite a bit.
> 
> Depends on PR#10647, so please review that one first.
> 
> Testing: gha, local testing, tier1-5 with other changes in this patch series, perf testing with other changes in this patch series

Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 - Merge branch 'master' into submit/8294842-pass-down-pending-cards
 - kbarrett review
 - initial version
 - initial version
 - initial version

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Changes: https://git.openjdk.org/jdk/pull/10649/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10649&range=02
  Stats: 20 lines in 3 files changed: 7 ins; 1 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/10649.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10649/head:pull/10649

PR: https://git.openjdk.org/jdk/pull/10649