whitelist fs (#2136)

## Changes
whitelist fs

### Linked issues
Progresses #1901 

### Functionality
None

### Tests
- [x] manually tested

---------

Co-authored-by: Eric Vergnaud <[email protected]>

Author: ericvergnaud

src/databricks/labs/ucx/source_code/known.json

@@ -4101,6 +4101,64 @@
   "frozenlist": {
     "frozenlist": []
   },
+  "fs": {
+    "fs": [],
+    "fs._bulk": [],
+    "fs._fscompat": [],
+    "fs._ftp_parse": [],
+    "fs._pathcompat": [],
+    "fs._repr": [],
+    "fs._typing": [],
+    "fs._tzcompat": [],
+    "fs._url_tools": [],
+    "fs._version": [],
+    "fs.appfs": [],
+    "fs.base": [],
+    "fs.compress": [],
+    "fs.constants": [],
+    "fs.copy": [],
+    "fs.enums": [],
+    "fs.error_tools": [],
+    "fs.errors": [],
+    "fs.filesize": [],
+    "fs.ftpfs": [],
+    "fs.glob": [],
+    "fs.info": [],
+    "fs.iotools": [],
+    "fs.lrucache": [],
+    "fs.memoryfs": [],
+    "fs.mirror": [],
+    "fs.mode": [],
+    "fs.mountfs": [],
+    "fs.move": [],
+    "fs.multifs": [],
+    "fs.opener": [],
+    "fs.opener.appfs": [],
+    "fs.opener.base": [],
+    "fs.opener.errors": [],
+    "fs.opener.ftpfs": [],
+    "fs.opener.memoryfs": [],
+    "fs.opener.osfs": [],
+    "fs.opener.parse": [],
+    "fs.opener.registry": [],
+    "fs.opener.tarfs": [],
+    "fs.opener.tempfs": [],
+    "fs.opener.zipfs": [],
+    "fs.osfs": [],
+    "fs.path": [],
+    "fs.permissions": [],
+    "fs.subfs": [],
+    "fs.tarfs": [],
+    "fs.tempfs": [],
+    "fs.time": [],
+    "fs.tools": [],
+    "fs.tree": [],
+    "fs.walk": [],
+    "fs.wildcard": [],
+    "fs.wrap": [],
+    "fs.wrapfs": [],
+    "fs.zipfs": []
+  },
   "fsspec": {
     "fsspec": [],
     "fsspec._version": [],