COMPAT: add back block manager constructors to pandas.core.internals API (#33892)

Author: jorisvandenbossche

pandas/core/internals/__init__.py

@@ -14,7 +14,12 @@
     make_block,
 )
 from pandas.core.internals.concat import concatenate_block_managers
-from pandas.core.internals.managers import BlockManager, SingleBlockManager
+from pandas.core.internals.managers import (
+    BlockManager,
+    SingleBlockManager,
+    create_block_manager_from_arrays,
+    create_block_manager_from_blocks,
+)
 
 __all__ = [
     "Block",
@@ -33,4 +38,7 @@
     "BlockManager",
     "SingleBlockManager",
     "concatenate_block_managers",
+    # those two are preserved here for downstream compatibility (GH-33892)
+    "create_block_manager_from_arrays",
+    "create_block_manager_from_blocks",
 ]