Storage: Support the s3, azure blob as the object storage of ragflow. (#2278)

### What problem does this PR solve?

issue: https://github.com/infiniflow/ragflow/issues/2277

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

rag/svr/task_executor.py

@@ -29,7 +29,7 @@ from functools import partial
 from api.db.services.file2document_service import File2DocumentService
 from api.settings import retrievaler
 from rag.raptor import RecursiveAbstractiveProcessing4TreeOrganizedRetrieval as Raptor
-from rag.utils.minio_conn import MINIO
+from rag.utils.storage_factory import STORAGE_IMPL
 from api.db.db_models import close_connection
 from rag.settings import database_logger, SVR_QUEUE_NAME
 from rag.settings import cron_logger, DOC_MAXIMUM_SIZE
@@ -138,7 +138,7 @@ def collect():
 
 
 def get_minio_binary(bucket, name):
-    return MINIO.get(bucket, name)
+    return STORAGE_IMPL.get(bucket, name)
 
 
 def build(row):
@@ -214,7 +214,7 @@ def build(row):
                 d["image"].save(output_buffer, format='JPEG')
 
             st = timer()
-            MINIO.put(row["kb_id"], d["_id"], output_buffer.getvalue())
+            STORAGE_IMPL.put(row["kb_id"], d["_id"], output_buffer.getvalue())
             el += timer() - st
         except Exception as e:
             cron_logger.error(str(e))