Retrieve spam submissions from `listSiteSubmissions` and `listFormSubmissions` functions

[aidanm1999]

Feature Request

- What is the current behaviour?
The functions listSiteSubmissions() and listFormSubmissions() only returns valid submissions. In your docs, you can pass in a ?state=spam path parameter, but when looking at the code in this repo:

{
    "operationId": "listSiteSubmissions",
    "parameters": {
        "body": {},
        "path": {
            "site_id": {
                "in": "path",
                "name": "site_id",
                "required": true,
                "type": "string"
            }
        }
    }
}

{
    "operationId": "listFormSubmissions",
    "parameters": {
        "body": {},
        "path": {
            "form_id": {
                "in": "path",
                "name": "form_id",
                "required": true,
                "type": "string"
            }
        }
    }
}

listSiteSubmissions() and listFormSubmissions() do not have the option to pass in the spam param.

- If the current behaviour is a bug, please provide the steps to reproduce.

- What is the expected behaviour?
To enable spam submissions being returned in the client:

client.listSiteSubmissions({ site_id, spam: true });
or
client.listSiteSubmissions({ site_id, state: "spam" });

- Please mention your node.js, and operating system version.
Node.js - v14.17.4
OS - macOS Monteray