[7.17] Added PHP 8.5 Support

[thecaliskan]

This MR introduces support for PHP 8.5 in conjunction with Elasticsearch 7.17. The changes ensure compatibility between the latest PHP features and the Elasticsearch client. Key updates include:

• Updated test to support PHP 8.5 runtime.
• Verified backward compatibility with PHP 8.4 and earlier versions.

These changes were thoroughly tested to maintain the stability and reliability of the integration while leveraging the latest PHP advancements.

[thecaliskan]

Hi @ezimuel

Could you check and then merge this PR ?

Test results (passed):

https://github.com/thecaliskan/elasticsearch-php/actions/runs/16263254829/job/45913146293

[miguelgrinberg]

Given that v7 hasn't been supported since 9.0 came out, and considering that this PR does not add anything other than including 8.5 in the CI, I'm going to close the issue.

But I recognize that v7 is still widely used, so my recommendation is that if any specific issues running this version on PHP 8.5 are discovered, a separate issue is written, so that we can evaluate if it makes sense for us to consider a fix.