RFR: 8336401: Remove the option onjcmd from the jdwp agent [v2]

[Chris Plummer]

On Tue, 8 Oct 2024 06:58:13 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

>> Remove the support for on-demand debugging via the onjcmd option.
>
> Johannes Bechberger has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use port 0 in TestAgentEvent

Changes look good. Thanks for taking care of this.

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Marked as reviewed by cjplummer (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21387#pullrequestreview-2355012768