T16489 apcu fetch 2

[niden]

Hello!

• Type: bug fix
• Link to issue: [BUG]: apcu_fetch(): Argument 2 ($success) must be passed by reference #16489

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Fixed Phalcon\Storage\Adapter\Apcu::phpApcuFetch to stop producing warnings due to the second parameter.

Thanks