test_capi_extract

[ludnic]

• [x] duckdb_bind_int32
• [x] duckdb_destroy_extracted
• [x] duckdb_destroy_prepare
• [x] duckdb_destroy_result
• [x] duckdb_execute_prepared
• [x] duckdb_extract_statements
• [x] duckdb_extract_statements_error
• [x] duckdb_prepare_extracted_statement
• [x] duckdb_value_int64

[ludnic]

missing ones implemented now in #54