arrow

ARROW-4265: [C++] Automatic conversion between Table and std::vector<std::tuple<..>>

This enables conversions between a `std::vector<std::tuple<…>>` like and `arrow::Table`.

tuple to Table:

```cpp
std::vector<std::tuple<double, std::string>> rows = ..
std::shared_ptr<Table> table;

if (!arrow::stl::TableFromTupleRange(
      arrow::default_memory_pool(),
      rows, names, &table).ok()
) {
  // Error handling code should go here.
}
```

Table to tuple:

```cpp
// An important aspect here is that the table columns need to be in the
// same order as the columns will later appear in the tuple. As the tuple
// is unnamed, matching is done on positions.
std::shared_ptr<Table> table = ..

// The range needs to be pre-allocated to the respective amount of rows.
// This allows us to pass in an arbitrary range object, not only
// `std::vector`.
std::vector<std::tuple<double, std::string>> rows(2);
if (!arrow::stl::TupleRangeFromTable(*table, &rows).ok()) {
  // Error handling code should go here.
}
```

Author: Korn, Uwe <Uwe.Korn@blue-yonder.com>
Author: Uwe L. Korn <uwelk@xhochy.com>

Closes #3404 from xhochy/stl-extension and squashes the following commits:

4856260a <Korn, Uwe> Cast to size_t to compare on equal signedness
aaeacfd1 <Uwe L. Korn> docker-compose run clang-format
386e5bc9 <Korn, Uwe> Check size of target
8b472da8 <Korn, Uwe> Update documentation
1a3743e0 <Korn, Uwe> Allow building shared libs without tests
9a08a3eb <Korn, Uwe> Use full path to checked_cast
e037507c <Korn, Uwe> Use ArrayFromJSON
1ab23f87 <Korn, Uwe> Move to type_singleton
30e66f9e <Korn, Uwe> Add additional STL conversions