RFR: 8370494: G1: NewSize not bounded by InitialHeapSize or MaxHeapSize

[Ivan Walulya]

Hi,

Please review this change to ensure that NewSize and MaxNewSize values specified on the command line are validated and adjusted to remain within the valid heap size range. Previously, G1 did not check for inconsistencies between` -XX:NewSize / -XX:MaxNewSize` and the `-XX:InitialHeapSize / -XX:MaxHeapSize`. As a result, users could configure `NewSize` or `MaxNewSize` values larger than the `MaxHeapSize` without receiving any warnings.

The change mirrors how Parallel GC already handles this scenario.

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Commit messages:
 - Merge remote-tracking branch 'upstream/master' into newsize_branch
 - Merge remote-tracking branch 'upstream/master' into newsize_branch
 - here

Changes: https://git.openjdk.org/jdk/pull/28111/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28111&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8370494
  Stats: 18 lines in 1 file changed: 18 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28111.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28111/head:pull/28111

PR: https://git.openjdk.org/jdk/pull/28111