Move s3fs to cloud extras (#15729)

Co-authored-by: Luca Antiga <luca@lightning.ai>
(cherry picked from commit dd75906)

requirements/app/base.txt

@@ -4,7 +4,6 @@ typing-extensions>=4.0.0, <=4.4.0
 deepdiff>=5.7.0, <=5.8.1
 starsessions>=1.2.1, <2.0 # strict
 fsspec>=2022.5.0, <=2022.7.1
-s3fs>=2022.5.0, <2022.8.3
 croniter>=1.3.0, <1.4.0  # strict; TODO: for now until we find something more robust.
 traitlets>=5.3.0, <=5.4.0
 arrow>=1.2.0, <1.2.4

requirements/app/cloud.txt

@@ -1,3 +1,4 @@
 redis>=4.0.1, <=4.2.4
 docker>=5.0.0, <=5.0.3
+s3fs>=2022.5.0, <2022.8.3
 # setuptools==59.5.0