fix: s3 user annotations (#2541)

do _not_ attempt to create the user annotations directory if an s3 location is specified

server/common/config/dataset_config.py

@@ -4,6 +4,7 @@ from os.path import splitext, isdir
 from server.common.annotations.local_file_csv import AnnotationsLocalFile
 from server.common.config.base_config import BaseConfig
 from server.common.errors import ConfigurationError, AnnotationsError
+from server.common.utils.data_locator import DataLocator
 from server.data_common.matrix_loader import MatrixDataLoader
 
 
@@ -127,7 +128,11 @@ class DatasetConfig(BaseConfig):
             if lf_ext and lf_ext != ".csv":
                 raise ConfigurationError(f"genesets file type must be .csv: {genesets_filename}")
 
-        if dirname is not None and not isdir(dirname):
+        if dirname is not None:
+            if not DataLocator(dirname).islocal():
+                # remote object stores only support objects but not directories, do nothing
+                pass
+            elif not isdir(dirname):
                 try:
                     os.mkdir(dirname)
                 except OSError: