(rpc-server): Failed to serialize JsonRpcError

[khorolets]

It's been happening for a long time.

During the last resharding some weird [still unresolved] issue happened on the nearcore regarding the hot/cold storage data transition. And some pieces of the data is missing from a Trie.

This results in an archival node responding with an error similar to

StorageError(MissingTrieValue(TrieStorage, 5pU46FzKxQz7wm3y4QaroG1pGFJeM9SGXFggWHXnD4JH))"

For some reason ReadRPC doesn't know how to serialize this error. We face this errors in those cases when we proxy requests to the native JSON RPC nodes (query.call_function on the *.poolv1.near).

We need to somehow empower ReadRPC with the serialization abitlities around this particular error type to be more clear to the users, since it's hard to understand what does "Failed to serialize JsonRpcError` means.

Step to reproduce

Request (HttPie)

http post https://archival-rpc.mainnet.near.org/ jsonrpc=2.0 id=qwe method=query params:='{                                                       
         "request_type": "call_function",
         "account_id": "astro-stakers.poolv1.near",
         "method_name": "get_accounts",
         "args_base64": "eyJmcm9tX2luZGV4IjogMCwgImxpbWl0IjogMTAwfQ==",
         "block_id": 123522710
     }'

The response is

{
    "error": {
        "cause": {
            "info": {
                "error_message": "Failed to serialize JsonRpcError"
            },
            "name": "INTERNAL_ERROR"
        },
        "code": -32000,
        "data": "Failed to serialize JsonRpcError",
        "message": "Server error",
        "name": "INTERNAL_ERROR"
    },
    "id": "qwe",
    "jsonrpc": "2.0"
}

But has to be

{
    "error": {
        "cause": {
            "info": {
                "error_message": "StorageError(MissingTrieValue(TrieStorage, 5pU46FzKxQz7wm3y4QaroG1pGFJeM9SGXFggWHXnD4JH))"
            },
            "name": "INTERNAL_ERROR"
        },
        "code": -32000,
        "data": "The node reached its limits. Try again later. More details: StorageError(MissingTrieValue(TrieStorage, 5pU46FzKxQz7wm3y4QaroG1pGFJeM9SGXFggWHXnD4JH))",
        "message": "Server error",
        "name": "INTERNAL_ERROR"
    },
    "id": "qwe",
    "jsonrpc": "2.0"
}