[php-src] Issue #10585: Add support for Oracle's open source library (ODPI-C) in OCI8 extension

Issue: https://github.com/php/php-src/issues/10585 Author: ericpp ### Description Oracle has released an "Oracle Database Programming Interface for C" open source client library that can be used as an alternative to their Instant Client binary-only libraries: https://oracle.github.io/odpi/ The Python Oracle libraries have switched to this library as it avoids the need for the user to separately download and install the Instant Client binaries and configure environment variables. New ODPI-C-based Python module: * https://oracle.github.io/python-oracledb/ * https://github.com/oracle/python-oracledb Old Instant Client-based Python module: * https://oracle.github.io/python-cx_Oracle/ * https://github.com/oracle/python-cx_Oracle I think this would be a great addition to the OCI8 extension as well. It would make installing the extension as simple as just running pecl install oci8 without any additional libraries, prompts, or parameters.