[C++] SQLAllocEnv & SQLFreeEnv implementation

[alinaliBQ]

Describe the enhancement requested

• implement SQLAllocEnv & SQLFreeEnv

• implement SQLAllocHandle and SQLFreeHandle to call SQLAllocEnv & SQLFreeEnv for env option

• Parent issue: [C++] Implement ODBC driver "wrapper" using FlightSQL #30622

Component(s)

FlightRPC