Expand can_cast_types for inner fields in struct dtype

[ion-elgreco]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

Describe the solution you'd like

Expand can_cast_types to support struct inner types can cast checks. Currently it's not possible to cast this because can_cast_types fails with structs:

"Cannot cast file schema field struct of type Struct([Field { name: \"x\", data_type: Int64, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }, Field { name: \"y\", data_type: LargeUtf8, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }]) to table schema field of type Struct([Field { name: \"x\", data_type: Int64, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }, Field { name: \"y\", data_type: Utf8, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }])"

Describe alternatives you've considered

Additional context

[tustvold]

Possible duplicate of #4908