arrow

GH-37906: [Integration][C#] Implement C Data Interface integration testing for C# (#37904)

### Rationale for this change

All Arrow implementations supporting the C Data Interface should also implement integration testing, to ensure proper interoperability.

### What changes are included in this PR?

* Implement C Data Interface integration testing for C#
* Fix bugs in the C Data Interface implementation for C#

### Are these changes tested?

Yes, by construction.

### Are there any user-facing changes?

No.
* Closes: #37906

Authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Antoine Pitrou <antoine@python.org>