RFR: 8350565: NMT: remaining memory flag/type to be replaced with memory tag

[Afshin Zafari]

There were some remaining flag or type for Memory Tag contexts.

Tests:
gtest:NMT* and runtime/NMT sets of tasks all passed.

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Commit messages:
 - 8350565: NMT: remaining memory flag/type to be replaced with memory tag

Changes: https://git.openjdk.org/jdk/pull/23769/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23769&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350565
  Stats: 77 lines in 17 files changed: 0 ins; 0 del; 77 mod
  Patch: https://git.openjdk.org/jdk/pull/23769.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23769/head:pull/23769

PR: https://git.openjdk.org/jdk/pull/23769