RFR: 8323715: Serial: Move genMemoryPools to serial folder

[Albert Mingkun Yang]

Simple moving files from shared to serial folder.

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Commit messages:
 - s1-move-pool

Changes: https://git.openjdk.org/jdk/pull/17418/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17418&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323715
  Stats: 12 lines in 3 files changed: 1 ins; 7 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/17418.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17418/head:pull/17418

PR: https://git.openjdk.org/jdk/pull/17418