Change JSON serialization formatting of ConnectorClient

[Danieladu]

Fixes #4462

Description

Change JSON serialization formatting from Formatting.Indented to Formatting.None .

Results

Remove the indention from the JSON body to shrink the size of HTTP request.

Local test result: With code:

            var serializerSettings = new JsonSerializerSettings
            {
                DateFormatHandling = DateFormatHandling.IsoDateFormat,
                DateTimeZoneHandling = DateTimeZoneHandling.Utc,
                NullValueHandling = NullValueHandling.Ignore,
                ReferenceLoopHandling = ReferenceLoopHandling.Serialize
            };

            var jObj = new JObject
            {
                ["key1"] = "value1",
                ["key2"] = "value2"
            };

            serializerSettings.Formatting = Formatting.None;
            Console.WriteLine("Serialization result with None formatting:");
            Console.WriteLine(JsonConvert.SerializeObject(jObj, serializerSettings));

            serializerSettings.Formatting = Formatting.Indented;
            Console.WriteLine("\r\nSerialization result with Indented formatting:");
            Console.WriteLine(JsonConvert.SerializeObject(jObj, serializerSettings));

Result screenshot:

[Danieladu]

@johnataylor @carlosscastro @mrivera-ms could this ready to merge?