[jdk18u] RFR: 8284549: JFR: FieldTable leaks FieldInfoTable member [v2]

[Zhengyu Gu]

> A clean and low risk backport to fix a memory leak in jfr leak profiler.

Zhengyu Gu has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into backport-8284549
 - Backport 92f5e42696847de7e47e238412d2d541a11bccd7

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk18u/pull/113/files
  - new: https://git.openjdk.java.net/jdk18u/pull/113/files/3c68511f..ef9e5504

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=113&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=113&range=00-01

  Stats: 16 lines in 2 files changed: 9 ins; 3 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/113.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/113/head:pull/113

PR: https://git.openjdk.java.net/jdk18u/pull/113