feat: Implement NoopAuthManager and integrate AuthManager into RestCatalog

Author: shuxu.li

src/iceberg/catalog/rest/http_client.cc

@@ -68,8 +68,7 @@ namespace {
 /// \brief Default error type for unparseable REST responses.
 constexpr std::string_view kRestExceptionType = "RESTException";
 
-/// \brief Build final request headers by merging request headers, default headers, and
-/// applying authentication.
+/// \brief Prepare headers for an HTTP request.
 Result<cpr::Header> BuildHeaders(
     const std::unordered_map<std::string, std::string>& request_headers,
     const std::unordered_map<std::string, std::string>& default_headers,

src/iceberg/catalog/rest/rest_catalog.cc

@@ -26,17 +26,14 @@
 
 #include <nlohmann/json.hpp>
 
-#include "iceberg/catalog/rest/auth/auth_manager.h"
 #include "iceberg/catalog/rest/auth/auth_managers.h"
-#include "iceberg/catalog/rest/auth/auth_session.h"
 #include "iceberg/catalog/rest/catalog_properties.h"
 #include "iceberg/catalog/rest/constant.h"
 #include "iceberg/catalog/rest/endpoint.h"
 #include "iceberg/catalog/rest/error_handlers.h"
 #include "iceberg/catalog/rest/http_client.h"
 #include "iceberg/catalog/rest/json_serde_internal.h"
 #include "iceberg/catalog/rest/resource_paths.h"
-#include "iceberg/catalog/rest/rest_catalog.h"
 #include "iceberg/catalog/rest/rest_util.h"
 #include "iceberg/catalog/rest/types.h"
 #include "iceberg/json_serde_internal.h"