fix(cts): add tests for HTML error (generated)

algolia/api-clients-automation#4097

Co-authored-by: algolia-bot <accounts+algolia-api-client-bot@algolia.com>
Co-authored-by: Pierre Millot <pierre.millot@algolia.com>

Author: algolia-bot

algoliasearch/src/main/java/com/algolia/internal/interceptors/RetryStrategy.java

@@ -84,6 +84,9 @@ private Response handleResponse(StatefulHost host, @Nonnull Response response) t
 
     try {
       String message = response.body() != null ? response.body().string() : response.message();
+      if (response.header("Content-Type", "application/json").contains("text/html")) {
+        message = response.message();
+      }
       throw isRetryable(response)
         ? new AlgoliaRequestException(message, response.code())
         : new AlgoliaApiException(message, response.code());