… correctly (#1168)

Fixes #1100 

Test before fix:
```
Expected equality of these values:
  AdbcGetObjectsDataGetTableByName(&mock_data, "mock_catalog", "mock_schema", "table_suffix")
    Which is: 0x16d014ee8
  &mock_table_suffix
    Which is: 0x16d014ea8
arrow-adbc/c/driver/common/utils_test.cc:220: Failure
Expected equality of these values:
  AdbcGetObjectsDataGetColumnByName(&mock_data, "mock_catalog", "mock_schema", "table", "column_suffix")
    Which is: 0x16d014df8
  &mock_column_suffix
    Which is: 0x16d014d48
arrow-adbc/c/driver/common/utils_test.cc:224: Failure
Expected equality of these values:
  AdbcGetObjectsDataGetConstraintByName(&mock_data, "mock_catalog", "mock_schema", "table", "constraint_suffix")
    Which is: 0x16d014d08
  &mock_constraint_suffix
    Which is: 0x16d014cc8
[  FAILED  ] AdbcGetObjectsData.GetObjectsByName (0 ms)
```

Test after fix:
```
$ ctest                                                                           
Test project arrow-adbc/build
    Start 1: adbc-driver-common-test
1/2 Test #1: adbc-driver-common-test ..........   Passed    0.25 sec
    Start 2: adbc-driver-sqlite-test
2/2 Test #2: adbc-driver-sqlite-test ..........   Passed    0.19 sec

100% tests passed, 0 tests failed out of 2

Label Time Summary:
driver-common    =   0.25 sec*proc (1 test)
driver-sqlite    =   0.19 sec*proc (1 test)
unittest         =   0.43 sec*proc (2 tests)

Total Test time (real) =   0.44 sec
```