RFR: 8310996: Add JFR event for connect operations [v9]

[Daniel Fuchs]

On Mon, 16 Dec 2024 20:24:20 GMT, Tim Prinzing <tprinzing at openjdk.org> wrote:

>> Adds a JFR event for socket connect operations.
>> 
>> Existing tests TestSocketEvents and TestSocketChannelEvents modified to also check for connect events.
>
> Tim Prinzing has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Refactored connect exception tests to a single IOHelper method
>   that takes a function argument that is excpected to produce the
>   appropriate exception.  IANA reserved ports in the range 225 to
>   241 are used to attempt to produce a connect exception.

The test updates LGTM

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PR Comment: https://git.openjdk.org/jdk/pull/21528#issuecomment-2551514817