binding conditions: stay in alpha in 1.35

There are too many open questions for beta.

#5487 (comment)

Author: pohly

keps/sig-scheduling/5007-device-attach-before-pod-scheduled/kep.yaml

@@ -23,7 +23,7 @@ see-also:
   - https://github.com/kubernetes/kubernetes/issues/124042#issuecomment-2548068135
 
 # The target maturity stage in the current dev cycle for this KEP.
-stage: beta
+stage: alpha
 #|beta|stable
 
 # The most recent milestone for which work toward delivery of this KEP has been