[Kotlin][Tests]: Add test for kotlin-jvm-okhttp (#20338)

* feat(issue-20231): add echo_api client for kotlin okhttp

* build(issue-20231): sync files

samples/client/echo_api/kotlin-jvm-okhttp/docs/AuthApi.md

@@ -0,0 +1,101 @@
+# AuthApi
+
+All URIs are relative to *http://localhost:3000*
+
+| Method | HTTP request | Description |
+| ------------- | ------------- | ------------- |
+| [**testAuthHttpBasic**](AuthApi.md#testAuthHttpBasic) | **POST** /auth/http/basic | To test HTTP basic authentication |
+| [**testAuthHttpBearer**](AuthApi.md#testAuthHttpBearer) | **POST** /auth/http/bearer | To test HTTP bearer authentication |
+
+
+<a id="testAuthHttpBasic"></a>
+# **testAuthHttpBasic**
+> kotlin.String testAuthHttpBasic()
+
+To test HTTP basic authentication
+
+To test HTTP basic authentication
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = AuthApi()
+try {
+    val result : kotlin.String = apiInstance.testAuthHttpBasic()
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling AuthApi#testAuthHttpBasic")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling AuthApi#testAuthHttpBasic")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+**kotlin.String**
+
+### Authorization
+
+
+Configure http_auth:
+    ApiClient.username = ""
+    ApiClient.password = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+<a id="testAuthHttpBearer"></a>
+# **testAuthHttpBearer**
+> kotlin.String testAuthHttpBearer()
+
+To test HTTP bearer authentication
+
+To test HTTP bearer authentication
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = AuthApi()
+try {
+    val result : kotlin.String = apiInstance.testAuthHttpBearer()
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling AuthApi#testAuthHttpBearer")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling AuthApi#testAuthHttpBearer")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+**kotlin.String**
+
+### Authorization
+
+
+Configure http_bearer_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+