Issue title: Make sender param names consistent
 Issue body: Right now at least such different values are used among different RPC calls:
`sender_account_id`, `originator_account_id`, `originator_id`, `sender`.

Let's use one common name among all RPC calls.

 Comments: 
 Comment 0: this was intentional. i think it makes to have different parameters for different contexts. a `sender` really only fits when you are sending money IMO. `sender` makes much less sense in the context of when you are creating an account or calling a function/
 Comment 1: ok, i'm fine with originator
{'source': 'GithubIssues', 'repo_name_with_owner': 'nearprotocol/nearcore', 'issue_id': 392430160, 'repo_stars': 734.0}