[refactor] dagster._core.definitions.solid_container -> node_container (

#12369)

### Summary & Motivation

- Rename module: dagster._core.definitions.solid_container ->
node_container

### How I Tested These Changes

BK

python_modules/dagster/dagster/_core/definitions/__init__.py

@@ -66,6 +66,7 @@
     TextMetadataValue as TextMetadataValue,
     UrlMetadataValue as UrlMetadataValue,
 )
+from .node_container import create_execution_structure as create_execution_structure
 from .node_definition import NodeDefinition as NodeDefinition
 from .output import (
     DynamicOut as DynamicOut,
@@ -111,7 +112,6 @@
     SensorDefinition as SensorDefinition,
     SensorEvaluationContext as SensorEvaluationContext,
 )
-from .solid_container import create_execution_structure as create_execution_structure
 
 # isort: split
 from .asset_group import AssetGroup as AssetGroup

python_modules/dagster/dagster/_core/definitions/graph_definition.py

@@ -47,10 +47,10 @@
 from .input import FanInInputPointer, InputDefinition, InputMapping, InputPointer
 from .logger_definition import LoggerDefinition
 from .metadata import MetadataEntry, PartitionMetadataEntry, RawMetadataValue
+from .node_container import create_execution_structure, validate_dependency_dict
 from .node_definition import NodeDefinition
 from .output import OutputDefinition, OutputMapping
 from .resource_requirement import ResourceRequirement
-from .solid_container import create_execution_structure, validate_dependency_dict
 from .version_strategy import VersionStrategy
 
 if TYPE_CHECKING: