Implement FFI versions of runtime environment and execution properties #19277
Description
Is your feature request related to a problem or challenge?
This is a follow on to #19223
To reduce the scope of that PR, two methods in the Session trait were not implemented, runtime_env and execution_props. It may be useful to some downstream users to have these available, specifically if any TableProviders make use of their contents.
Describe the solution you'd like
Follow the same design pattern as the rest of the FFI crate and implement these structs.
Expose them in FFI_Session
Describe alternatives you've considered
We can leave as is for now, which is no worse than what currently exists before FFI_Session was implemented.
Additional context
There has not been any user requests, so this may not be high priority.