Lumped Forcings Engine Data Provider

This PR adds the ForcingsEngineLumpedDataProvider class, inheriting from ForcingsEngineDataProvider<double, CatchmentAggrDataSelector>.

This provider interacts with the python-based Forcings Engine when running in "hydrofabric" mode (i.e. in the configuration file, GRID_TYPE="hydrofabric"). The following variables are accessible through the data provider interface:

BMI Variable	Alias	Description	Units
`U2D_ELEMENT`	`U2D`	10-m U-component of wind	m/s
`V2D_ELEMENT`	`V2D`	10-m V-component of wind	m/s
`T2D_ELEMENT`	`T2D`	2-m Air Temperature	K
`Q2D_ELEMENT`	`Q2D`	2-m Specific Humidity	kg/kg
`LWDOWN_ELEMENT`	`LWDOWN`	Surface downward long-wave radiation flux	W/m^2
`SWDOWN_ELEMENT`	`SWDOWN`	Surface downward short-wave radiation flux	W/m^2
`PSFC_ELEMENT`	`PSFC`	Surface Pressure	Pa
`RAINRATE_ELEMENT`	`RAINRATE`	Surface Precipitation Rate	mm/s

Within the engine's catchment domain, each variable has an aggregated scalar value for each catchment. As such, every constructed lumped data provider is associated with a single catchment (but, the underlying forcings engine instance is shared between them).

~This PR also includes a minor change to the parent base class, which moves the time and config file path member variables into the protected scope to allow printing of them in derived functions/exceptions and prevent the need to perform some conversions within std::chrono if they were kept in the private scope.~

These changes were incorporated in #851.

Additions

Adds data_access::ForcingsEngineLumpedDataProvider
Adds ForcingsEngineLumpedDataProviderTest test fixture using AORC data from AWS S3.
Includes a ESMF-compliant mesh for a hydrofabric subset along USGS Gage-01073000.

Testing

Unit tests using GCC 13 and Clang 17.

Notes

In order to run the forcings engine unit tests prerequisites must be met:

Set the $WGRIB2 environment variable with the path to your wgrib2 executable, e.g.
```
export WGRIB2=$(which wgrib2)
```
Ensure ESMF and esmpy are installing either system-wide or in your virtual environment.
The master branch of https://github.com/NOAA-OWP/ngen-forcing must be installed.

Checklist

[X] PR has an informative and human-readable title
[X] Changes are limited to a single goal (no scope creep)
[X] Code can be automatically merged (no conflicts)
[X] Code follows project standards (link if applicable)
[x] Passes all existing automated tests
[X] Any change in functionality is tested
[X] New functions are documented (with a description, list of inputs, and expected output)
[X] Placeholder code is flagged / future todos are captured in comments
[X] Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
[x] Reviewers requested with the Reviewers tool :arrow_right:

NOAA-OWP / ngen