GetIndexTemplate causes deserialization error on the response

[stevejgordon]

Elastic.Clients.Elasticsearch version: 8.0.4
Elasticsearch version: 8.x

Description of the problem including expected versus actual behavior:
When requesting an index template vi the GetIndexTemplate methods, an exception is thrown when deserializing the response. Originally raised in discuss forum.

Steps to reproduce:

1. Request an index template via the client

var getIndexTemplateResponse = await _elasticClient.Indices.GetIndexTemplateAsync(d => d
	.Name(templateName));

Expected behavior
Correct deserialization of the response.

Actual behavior
An expectation is thrown:

Elastic.Transport.UnexpectedTransportException: The JSON value could not be converted to Elastic.Clients.Elasticsearch.Names. Path: $.index_templates[0].index_template.index_patterns | LineNumber: 5 | BytePositionInLine: 28. ---> System.Text.Json.JsonException: The JSON value could not be converted to Elastic.Clients.Elasticsearch.Names. Path: $.index_templates[0].index_template.index_patterns | LineNumber: 5 | BytePositionInLine: 28.
   bei System.Text.Json.ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(Type propertyType)
   bei System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   bei System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   bei System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.JsonCollectionConverter`2.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, TCollection& value)
   bei System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   bei System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   bei System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   bei System.Text.Json.JsonSerializer.ReadCore[TValue](JsonReaderState& readerState, Boolean isFinalBlock, ReadOnlySpan`1 buffer, JsonSerializerOptions options, ReadStack& state, JsonConverter converterBase)
   bei System.Text.Json.JsonSerializer.ContinueDeserialize[TValue](ReadBufferState& bufferState, JsonReaderState& jsonReaderState, ReadStack& readStack, JsonConverter converter, JsonSerializerOptions options)
   bei System.Text.Json.JsonSerializer.<ReadAllAsync>d__65`1.MoveNext()

Example of the response from Kibana

{
  "index_templates": [
    {
      "name": "template_1",
      "index_template": {
        "index_patterns": [
          "te*"
        ],
        "template": {
          "settings": {
            "index": {
              "number_of_shards": "2"
            }
          }
        },
        "composed_of": [],
        "priority": 1
      }
    }
  ]
}