fix: bump pinned pyfilesystem2 version (#30338)

This commit fixes unpickling of exceptions that are based on `fs.error.ResourceError`,
which definitely happens if such an exception is throwed withing a Celery task
and, in turn, causes Celery worker to shut down.

See the details here: https://stackoverflow.com/a/41809333

The new version overrides `__reduce__` as suggested.

requirements/edx/base.in

@@ -96,7 +96,7 @@ edx-user-state-client
 edx-when
 edxval
 event-tracking
-fs==2.0.18
+fs
 fs-s3fs==0.1.8
 geoip2                              # Python API for the GeoIP web services and databases
 glob2                               # Enhanced glob module, used in openedx.core.lib.rooted_paths

requirements/edx/base.txt

@@ -558,7 +558,7 @@ frozenlist==1.3.0
     # via
     #   aiohttp
     #   aiosignal
-fs==2.0.18
+fs==2.0.27
     # via
     #   -r requirements/edx/base.in
     #   django-pyfs

requirements/edx/development.txt

@@ -710,7 +710,7 @@ frozenlist==1.3.0
     #   -r requirements/edx/testing.txt
     #   aiohttp
     #   aiosignal
-fs==2.0.18
+fs==2.0.27
     # via
     #   -r requirements/edx/testing.txt
     #   django-pyfs

requirements/edx/testing.txt

@@ -685,7 +685,7 @@ frozenlist==1.3.0
     #   -r requirements/edx/base.txt
     #   aiohttp
     #   aiosignal
-fs==2.0.18
+fs==2.0.27
     # via
     #   -r requirements/edx/base.txt
     #   django-pyfs