Implement the OracleConfigurationProvider API

[jheiselman]

1. Describe your new request in detail

Implement the OracleConfigurationProvider as done in the 23ai version of the OJDBC driver. Additionally, implement the two built-in providers, file and https.

https://docs.oracle.com/en/database/oracle/oracle-database/23/jajdb/oracle/jdbc/spi/OracleConfigurationProvider.html

We are currently working to use the built-in https provider to provide dynamic JDBC parameters, connection descriptors, and credentials to the OJDBC driver in our Java-based applications. We have a handful of Python applications that also connect to the same Oracle instances, so would like to use the same mechanism there, though primarily just for the purposes of providing credentials.

2. Give supporting information about tools and operating systems. Give relevant product version numbers

OJDBC driver version 23ai is the reference implementation.

[cjbj]

Python-oracledb 3.0 supports File, OCI, and Azure config providers: https://python-oracledb.readthedocs.io/en/latest/user_guide/connection_handling.html#centralized-configuration-providers

HTTP support is a future task.