RFR: 8344734: Rename memoryFileTracker to nativeMemoryFileTracker

[Anton Artemov]

Renamed memoryFileTracker to nativeMemoryFileTracker.

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Commit messages:
 - 8344734: renamed memoryFileTracker to nativeMemoryFileTracker

Changes: https://git.openjdk.org/jdk/pull/24579/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24579&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344734
  Stats: 507 lines in 12 files changed: 239 ins; 239 del; 29 mod
  Patch: https://git.openjdk.org/jdk/pull/24579.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24579/head:pull/24579

PR: https://git.openjdk.org/jdk/pull/24579