add: POC of resourceFetchType

[cdillard-NewRelic]

It kind of works with this form:

    func fetchTypeDelegatePath() {
        NewRelic.logInfo("[FetchTypeTest A] firing delegate-session request #1")
        let t1 = self.fetchTypeSession.dataTask(with: self.fetchTypeURL)
        t1.resume()
        DispatchQueue.main.asyncAfter(deadline: .now() + 3) { [self] in
            NewRelic.logInfo("[FetchTypeTest A] firing delegate-session request #2")
            let t2 = self.fetchTypeSession.dataTask(with: self.fetchTypeURL)
            t2.resume()
        }
    }

yields mobileRequest events of type including new resourceFetchType and wireStatusCode

	}, {
		"id": "02c52bafce794505",
		"connectionType": "wifi",
		"timeSinceLoad": 16.618823051452637,
		"eventType": "MobileRequest",
		"timestamp": 1779215732618,
		"requestMethod": "GET",
		"contentType": "application\/json; charset=utf-8",
		"trace.id": "111e9845ce2142258b67f27a81a0563f",
		"requestDomain": "api.github.com",
		"requestUrl": "https:\/\/api.github.com\/users\/octocat",
		"requestPath": "\/users\/octocat",
		"resourceFetchType": "networkLoad",
		"statusCode": 200,
		"traceId": "111e9845ce2142258b67f27a81a0563f",
		"bytesReceived": 327,
		"guid": "02c52bafce794505",
		"responseTime": 6.9347348632812498,
		"wireStatusCode": 200,
		"payload": {
			"v": "[0,2]",
			"d": {
				"ap": "246132793",
				"ac": "10816994",
				"id": "02c52bafce794505",
				"tk": "1",
				"ti": 1779215725.6822128,
				"ty": "mobile",
				"tr": "111e9845ce2142258b67f27a81a0563f"
			}
		}
	}, {
		"id": "5dd2c0ae6117480a",
		"connectionType": "wifi",
		"timeSinceLoad": 16.621788024902344,
		"eventType": "MobileRequest",
		"timestamp": 1779215732621,
		"requestMethod": "GET",
		"contentType": "application\/json; charset=utf-8",
		"trace.id": "fe1911dd0c3647c08fe5425d6c83451f",
		"requestDomain": "api.github.com",
		"requestUrl": "https:\/\/api.github.com\/users\/octocat",
		"requestPath": "\/users\/octocat",
		"resourceFetchType": "localCache",
		"statusCode": 200,
		"traceId": "fe1911dd0c3647c08fe5425d6c83451f",
		"bytesReceived": 469,
		"guid": "5dd2c0ae6117480a",
		"responseTime": 0.0048198242187500002,
		"wireStatusCode": 200,
		"payload": {
			"v": "[0,2]",
			"d": {
				"ap": "246132793",
				"ac": "10816994",
				"id": "5dd2c0ae6117480a",
				"tk": "1",
				"ti": 1779215732.616358,
				"ty": "mobile",
				"tr": "fe1911dd0c3647c08fe5425d6c83451f"
			}
		}
	},
	```