refactor(shredding): unify shredding read plans for map shredding and variant (#235)

Author: lxy-9602

src/paimon/CMakeLists.txt

@@ -173,7 +173,7 @@ set(PAIMON_COMMON_SRCS
     common/data/shredding/map_shared_shredding_batch_converter.cpp
     common/data/shredding/map_shared_shredding_column_allocator.cpp
     common/data/shredding/lru_map_shared_shredding_column_allocator.cpp
-    common/data/shredding/map_shared_shredding_file_reader.cpp
+    common/data/shredding/map_shared_shredding_read_plan_factory.cpp
     common/data/shredding/shredding_file_reader.cpp
     common/utils/delta_varint_compressor.cpp
     common/utils/fields_comparator.cpp
@@ -682,7 +682,7 @@ if(PAIMON_BUILD_TESTS)
                     common/data/shredding/sequential_map_shared_shredding_column_allocator_test.cpp
                     common/data/shredding/map_shared_shredding_field_dict_test.cpp
                     common/data/shredding/map_shared_shredding_context_test.cpp
-                    common/data/shredding/map_shared_shredding_file_reader_test.cpp
+                    common/data/shredding/map_shared_shredding_read_plan_factory_test.cpp
                     STATIC_LINK_LIBS
                     paimon_shared
                     test_utils_static