[amoeba]

Updates the Rust driver manager search code to return errors and error details that match what C++ and C# do.

Each test covers a case and the table below describes what changed at high level:

Test	Before	After
test_load_from_name_missing_or_invalid_driver	Internal	NotFound, with the path in the error
test_manifest_wrong_arch	InvalidArguments	NotFound, with more detail in the error
test_load_dynamic_missing_driver	Internal	NotFound, with the path in the error
test_empty_driver_name	NotFound	InvalidArguments, with a clear error message
test_load_from_name_invalid_manifest_by_path_or_name	InvalidArguments by path, NotFound by name	InvalidArguments either way, and the error includes the manifest path
test_relative_driver_path_disallowed	InvalidArguments	InvalidArguments, and the error now includes the path

This PR makes the Rust column in the table on #4973 match the other columns.

Continuation of:

• test(c): increase test coverage for driver manager #4972
• fix(csharp): align driver and manifest loading errors with c++ #4973

This PR was created by driving Opus 5.5 around. I reviewed it with GPT Sol 6.1 and Opus 5.5 and reviewed the tests myself.