Fix debug warnings/errors in from_arrow_device_test.cpp

[davidwendt]

Description

Fixes debug build errors introduced by #15458

These warnings show up in a debug build where warnings become errors.
Some of the errors:

/cudf/cpp/tests/interop/from_arrow_device_test.cpp:103:27: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaSetTypeStruct(ArrowSchema*, int64_t)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  103 |   ArrowSchemaSetTypeStruct(input_schema.get(), 1);
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:105:29: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaSetTypeDateTime(ArrowSchema*, ArrowType, ArrowTimeUnit, const char*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  105 |   ArrowSchemaSetTypeDateTime(
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:107:21: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaSetName(ArrowSchema*, const char*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  107 |   ArrowSchemaSetName(input_schema->children[0], "a");
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:110:27: error: ignoring return value of 'ArrowErrorCode cudfArrowArrayInitFromSchema(ArrowArray*, const ArrowSchema*, ArrowError*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  110 |   ArrowArrayInitFromSchema(input_array.get(), input_schema.get(), nullptr);
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:115:26: error: ignoring return value of 'ArrowErrorCode ArrowBufferSetAllocator(ArrowBuffer*, ArrowBufferAllocator)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  115 |   ArrowBufferSetAllocator(ArrowArrayBuffer(input_array->children[0], 1), noop_alloc);
      |   ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:118:27: error: ignoring return value of 'ArrowErrorCode cudfArrowArrayFinishBuilding(ArrowArray*, ArrowValidationLevel, ArrowError*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  118 |   ArrowArrayFinishBuilding(input_array.get(), NANOARROW_VALIDATION_LEVEL_MINIMAL, nullptr);
/cudf/cpp/tests/interop/from_arrow_device_test.cpp: In member function 'virtual void FromArrowDeviceTest_NestedList_Test::TestBody()':
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:202:27: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaSetTypeStruct(ArrowSchema*, int64_t)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  202 |   ArrowSchemaSetTypeStruct(input_schema.get(), 1);
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:204:26: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaInitFromType(ArrowSchema*, ArrowType)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  204 |   ArrowSchemaInitFromType(input_schema->children[0], NANOARROW_TYPE_LIST);
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:205:21: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaSetName(ArrowSchema*, const char*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  205 |   ArrowSchemaSetName(input_schema->children[0], "a");
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:208:26: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaInitFromType(ArrowSchema*, ArrowType)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  208 |   ArrowSchemaInitFromType(input_schema->children[0]->children[0], NANOARROW_TYPE_LIST);
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:209:21: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaSetName(ArrowSchema*, const char*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  209 |   ArrowSchemaSetName(input_schema->children[0]->children[0], "element");
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:212:26: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaInitFromType(ArrowSchema*, ArrowType)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  212 |   ArrowSchemaInitFromType(input_schema->children[0]->children[0]->children[0],
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:214:21: error: ignoring return value of 'ArrowErrorCode cudfArrowSchemaSetName(ArrowSchema*, const char*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  214 |   ArrowSchemaSetName(input_schema->children[0]->children[0]->children[0], "element");
/cudf/cpp/tests/interop/from_arrow_device_test.cpp:226:27: error: ignoring return value of 'ArrowErrorCode cudfArrowArrayFinishBuilding(ArrowArray*, ArrowValidationLevel, ArrowError*)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  226 |   ArrowArrayFinishBuilding(input_array.get(), NANOARROW_VALIDATION_LEVEL_NONE, nullptr);
/cudf/cpp/tests/interop/from_arrow_device_test.cpp: In member function 'virtual void FromArrowDeviceTest_StructColumn_Test::TestBody()':

Closes #15597

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[mhaseeb123]

Looks like C++ INTEROP_TEST is failing.

Waiting for the C++ tests to pass to approve.

[mhaseeb123]

Thanks for investigating this in #15597 and fixing the tests. Looks good to me!

[davidwendt]

/merge