RFR: 8324613: Serial: Rename GenerationPool to TenuredGenerationPool

Wed Jan 24 10:35:34 UTC 2024

Trivial renaming to use concrete subtype.

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Commit messages:
 - s1-old-gen-pool

Changes: https://git.openjdk.org/jdk/pull/17551/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17551&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324613
  Stats: 10 lines in 3 files changed: 0 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/17551.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17551/head:pull/17551

PR: https://git.openjdk.org/jdk/pull/17551