RFR: 8345421: (bf) Create specific test for temporary direct buffers and the buffer size limit [v3]

[Brian Burkhalter]

> Add a specific test for [JDK-8344882](https://bugs.openjdk.org/browse/JDK-8344882).

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8345421: use try-with-resources; deleteIfExists -> delete

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22525/files
  - new: https://git.openjdk.org/jdk/pull/22525/files/c5f3f8c3..7a537639

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22525&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22525&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/22525.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22525/head:pull/22525

PR: https://git.openjdk.org/jdk/pull/22525