feat grpc: add builder for google.rpc.Status

Added a comprehensive builder for creating rich gRPC error statuses with
structured details following Google's error model. The new builder
enables creating standards-compliant rich error responses with minimal
boilerplate

1\. Implemented \`ugrpc::RichStatus\` class to simplify construction of \`google::rpc::Status\` objects

2\. Added \`RichStatus::TryGetDetail\` utility for extracting error details from statuses
commit_hash:0fb91f89fb99dad7271d520c2502f6c1db181838

Author: ivan-skryabin

.mapping.json

@@ -2314,6 +2314,7 @@
   "grpc/include/userver/ugrpc/proto_json.hpp":"taxi/uservices/userver/grpc/include/userver/ugrpc/proto_json.hpp",
   "grpc/include/userver/ugrpc/protobuf_logging.hpp":"taxi/uservices/userver/grpc/include/userver/ugrpc/protobuf_logging.hpp",
   "grpc/include/userver/ugrpc/protobuf_visit.hpp":"taxi/uservices/userver/grpc/include/userver/ugrpc/protobuf_visit.hpp",
+  "grpc/include/userver/ugrpc/rich_status.hpp":"taxi/uservices/userver/grpc/include/userver/ugrpc/rich_status.hpp",
   "grpc/include/userver/ugrpc/server/call_context.hpp":"taxi/uservices/userver/grpc/include/userver/ugrpc/server/call_context.hpp",
   "grpc/include/userver/ugrpc/server/component_list.hpp":"taxi/uservices/userver/grpc/include/userver/ugrpc/server/component_list.hpp",
   "grpc/include/userver/ugrpc/server/exceptions.hpp":"taxi/uservices/userver/grpc/include/userver/ugrpc/server/exceptions.hpp",
@@ -2453,6 +2454,7 @@
   "grpc/src/ugrpc/proto_json.cpp":"taxi/uservices/userver/grpc/src/ugrpc/proto_json.cpp",
   "grpc/src/ugrpc/protobuf_logging.cpp":"taxi/uservices/userver/grpc/src/ugrpc/protobuf_logging.cpp",
   "grpc/src/ugrpc/protobuf_visit.cpp":"taxi/uservices/userver/grpc/src/ugrpc/protobuf_visit.cpp",
+  "grpc/src/ugrpc/rich_status.cpp":"taxi/uservices/userver/grpc/src/ugrpc/rich_status.cpp",
   "grpc/src/ugrpc/server/call_context.cpp":"taxi/uservices/userver/grpc/src/ugrpc/server/call_context.cpp",
   "grpc/src/ugrpc/server/component_list.cpp":"taxi/uservices/userver/grpc/src/ugrpc/server/component_list.cpp",
   "grpc/src/ugrpc/server/exceptions.cpp":"taxi/uservices/userver/grpc/src/ugrpc/server/exceptions.cpp",
@@ -2514,6 +2516,7 @@
   "grpc/tests/datetime_utils_test.cpp":"taxi/uservices/userver/grpc/tests/datetime_utils_test.cpp",
   "grpc/tests/deadline_metrics_test.cpp":"taxi/uservices/userver/grpc/tests/deadline_metrics_test.cpp",
   "grpc/tests/deadline_test.cpp":"taxi/uservices/userver/grpc/tests/deadline_test.cpp",
+  "grpc/tests/detailed_error_test.cpp":"taxi/uservices/userver/grpc/tests/detailed_error_test.cpp",
   "grpc/tests/dump_protobuf_test.cpp":"taxi/uservices/userver/grpc/tests/dump_protobuf_test.cpp",
   "grpc/tests/error_test.cpp":"taxi/uservices/userver/grpc/tests/error_test.cpp",
   "grpc/tests/generic_client_test.cpp":"taxi/uservices/userver/grpc/tests/generic_client_test.cpp",
@@ -2527,6 +2530,7 @@
   "grpc/tests/protobuf_utils_test.cpp":"taxi/uservices/userver/grpc/tests/protobuf_utils_test.cpp",
   "grpc/tests/protobuf_visit_test.cpp":"taxi/uservices/userver/grpc/tests/protobuf_visit_test.cpp",
   "grpc/tests/retry_test.cpp":"taxi/uservices/userver/grpc/tests/retry_test.cpp",
+  "grpc/tests/rich_status_test.cpp":"taxi/uservices/userver/grpc/tests/rich_status_test.cpp",
   "grpc/tests/secret_fields_test.cpp":"taxi/uservices/userver/grpc/tests/secret_fields_test.cpp",
   "grpc/tests/serialization_test.cpp":"taxi/uservices/userver/grpc/tests/serialization_test.cpp",
   "grpc/tests/server_middleware_hooks_streaming_test.cpp":"taxi/uservices/userver/grpc/tests/server_middleware_hooks_streaming_test.cpp",