Backport influxdb3_config to influxdb from influxdb_pro

[mgattozzi]

As part of https://github.com/influxdata/influxdb_pro/pull/193 the influxdb3_config crate was introduced. As this is also meant to hold configuration for the OSS version as well if needed the crate should be brought back to upstream (OSS).

As the ProConfig has no bearing on how OSS runs or contains anything that would make pro it's own separate viable product we can include it's code as well and how it's threaded throughout the code so as to reduce any conflicts in the future in influxdb_pro if changes are made to configuration.