v1.11.1

Adds an easyjson marshaler and unmarshaler for execResponseRowType.

This struct has a member with an unexported data type (fieldMetadata).
Without the explicit marshaler/unmarshaler, we cannot use easyjson
outside of this mod.

Failings unit tests
Both upstream and origin
- TestArrowBatchHighPrecision
- TestLongRunningAsyncQueryFetchResultByID
- TestBindingBulkArray
- TestMaxLobSize
- TestUrlDecodeIfNeededE2E

Only origin:
- TestBulkArrayBinding