RFR: JDK-8349077 : Rename GenerationCounters::update_all

[Suchismith Roy]

JBS Issue : [JDK-8349077](https://bugs.openjdk.org/browse/JDK-8349077)

we found the method names `update_all` of the class `GenerationCounters` and its subclasses are not so good. It is better to rename it to something like `update_capacity` (such as `ZGenerationCounters::update_capacity`).

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Commit messages:
 -  copyright
 - update capacity

Changes: https://git.openjdk.org/jdk/pull/25831/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25831&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349077
  Stats: 46 lines in 16 files changed: 0 ins; 0 del; 46 mod
  Patch: https://git.openjdk.org/jdk/pull/25831.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25831/head:pull/25831

PR: https://git.openjdk.org/jdk/pull/25831