ome_zarr.format: do not normalize_keys

For writing HCS datasets where group names are case-sensitive (e.g. A), this
option alters the name and creates a mismatch with the plate metadata.

ome_zarr/format.py

@@ -106,7 +106,7 @@ def init_store(self, path: str, mode: str = "r") -> FSStore:
 
         kwargs = {
             "dimension_separator": "/",
-            "normalize_keys": True,
+            "normalize_keys": False,
         }
 
         mkdir = True