RFR: 8356095: AArch64: Obsolete -XX:+NearCPool option

[Boris Ulasevich]

The NearCPool option has no effect since #24883. This patch marks NearCpool as obsolete in arguments.cpp, and removes its declaration from globals_aarch64.hpp.

JBS: https://bugs.openjdk.org/browse/JDK-8356095
CSR: https://bugs.openjdk.org/browse/JDK-8356097

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Commit messages:
 - 8356095: AArch64: Obsolete -XX:+NearCPool option

Changes: https://git.openjdk.org/jdk/pull/25010/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25010&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8356095
  Stats: 5 lines in 2 files changed: 3 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/25010.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25010/head:pull/25010

PR: https://git.openjdk.org/jdk/pull/25010