refactor: Repeated boilerplate code between upload to database forms (#16756)

* abstract boilerplate code into class and rename csv to file

* add db migration

* fix some stuff

* more renaming of csv to file

* rename in translations

* update down revision

* update down revision

* bump chart version

* switch to alter column name approach in db migration

* fix db migration for MySQL

* db migration conflict

docs/src/pages/docs/installation/kubernetes.mdx

@@ -185,12 +185,12 @@ Data source definitions can be automatically declared by providing key/value yam
 extraConfigs:
   datasources-init.yaml: |
     databases:
-    - allow_csv_upload: true
+    - allow_file_upload: true
       allow_ctas: true
       allow_cvas: true
       database_name: example-db
       extra: "{\r\n    \"metadata_params\": {},\r\n    \"engine_params\": {},\r\n    \"\
-        metadata_cache_timeout\": {},\r\n    \"schemas_allowed_for_csv_upload\": []\r\n\
+        metadata_cache_timeout\": {},\r\n    \"schemas_allowed_for_file_upload\": []\r\n\
         }"
       sqlalchemy_uri: example://example-db.local
       tables: []