Support nearcore 1.37

[telezhnaya]

We need to adapt to changed RPC methods and potentially start using the new ones.

More details: https://github.com/near/nearcore/blob/447572bb775a5954ca7a5a4b65c85b45aab9e499/chain/jsonrpc/CHANGELOG.md#023
Copy-pasting the most important parts here

Added send_tx method which gives configurable execution guarantees options and potentially replaces existing broadcast_tx_async, broadcast_tx_commit
Field final_execution_status is presented in the response of methods tx, EXPERIMENTAL_tx_status, broadcast_tx_commit, send_tx
Allowed use json in request for methods EXPERIMENTAL_tx_status, tx, broadcast_tx_commit, broadcast_tx_async, send_tx
Parameter wait_until (same entity as final_execution_status in the response) is presented as optional request parameter for methods EXPERIMENTAL_tx_status, tx, send_tx. The response will be returned only when the desired level of finality is reached
Breaking changes

Removed EXPERIMENTAL_check_tx method. Use tx method instead
Removed EXPERIMENTAL_broadcast_tx_sync method. Use send_tx method instead

The nearcore updates timeline: near/nearcore#10404

[jaswinder6991]

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