Process global_contract_hash and global_contract_account_id in 0.30 release

[akorchyn]

Unfortunately, the near-primitives 0.29 release did not update the AccountView struct with the new fields. These fields have been added in version 0.30-rc1

Once the 0.30 release is out, we should update ViewAccountSummary to display the new code path.
I propose displaying it as a single field with variants, depending on the populated values in AccountView.

Additionally, we need to use these fields to parse the code and fetch the contract ABI. For now, we won't be able to provide view methods for users utilizing Global Contracts.