mgr/dashboard: fix Python xmlsec build issue

It disables the specific pinning to a Python xmlsec version.

Fixes: https://tracker.ceph.com/issues/70019
Fixes: 37e6333
Fixes: ceph#61089

Signed-off-by: Ernesto Puerta <[email protected]>

Author: epuertat

src/pybind/mgr/dashboard/requirements-test.txt

@@ -3,4 +3,4 @@ pytest-instafail
 pyfakefs==4.5.0
 jsonschema~=4.0
 PyJWT~=2.0
-xmlsec==1.3.13 # Pinning because of https://github.com/xmlsec/python-xmlsec/issues/314
+#xmlsec==1.3.13 # Pinning because of https://github.com/xmlsec/python-xmlsec/issues/314