fix: manage php8 migration for curl functions

[pifou25]

Description

curl_init, starting from php8: On success, this function returns a CurlHandle instance now; previously, a resource was returned.

any other curl_* function (e.g. curl_setopt ) starting from php8: handle expects a CurlHandle instance now; previously, a resource was expected.

conclusion : nothing to change, except for ìs_resource()andcurl_close()`

Suggested changelog entry

• fix: manage php8 migration for curl functions

Related issues/external references

Fixes #2676

Types of changes

• [x] Bug fix (non-breaking change which fixes)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
  • [ ] This change is only breaking for integrators, not for external standards or end-users.
• [ ] Documentation improvement

PR checklist

• [x] I have checked there is no other PR open for the same change.
• [x] I have read the [La ligne directrice pour contribuer à ce projet / Contribution guidelines for this project).
• [x] I grant the project the right to include and distribute the code under the GNU.
• [ ] I have added tests to cover my changes.
• [x] I have verified that the code complies with the projects coding standards.
• [ ] [Required for new sniffs] I have added MD documentation for the sniff.