[jdk18u] RFR: 8284094: Memory leak in invoker_completeInvokeRequest()

[Andrew John Hughes]

Hi all,

This pull request contains a backport of commit [1dfa1eae](https://github.com/openjdk/jdk/commit/1dfa1eaea0c8958f4b793c0766e36607cbde5c7f) from the [openjdk/jdk](https://git.openjdk.java.net/jdk) repository.

The commit being backported was authored by Roman Kennke on 1 Apr 2022 and was reviewed by Chris Plummer and Aleksey Shipilev.

This fixes a memory leak in the JDWP agent. It has baked in trunk for over a month and should now be safe enough to backport to stable releases.

Thanks!

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Commit messages:
 - Backport 1dfa1eaea0c8958f4b793c0766e36607cbde5c7f

Changes: https://git.openjdk.java.net/jdk18u/pull/134/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=134&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8284094
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/134.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/134/head:pull/134

PR: https://git.openjdk.java.net/jdk18u/pull/134