refactor: rename snapshot expiration methods for clarity and consistency

Author: ForeverAngry

pyiceberg/table/update/snapshot.py

@@ -952,7 +952,7 @@ def _get_protected_snapshot_ids(self) -> Set[int]:
 
         return protected_ids
 
-    def expire_snapshot_by_id(self, snapshot_id: int) -> ExpireSnapshots:
+    def by_id(self, snapshot_id: int) -> ExpireSnapshots:
         """
         Expire a snapshot by its ID.
 
@@ -973,7 +973,7 @@ def expire_snapshot_by_id(self, snapshot_id: int) -> ExpireSnapshots:
 
         return self
 
-    def expire_snapshots_by_ids(self, snapshot_ids: List[int]) -> "ExpireSnapshots":
+    def by_ids(self, snapshot_ids: List[int]) -> "ExpireSnapshots":
         """
         Expire multiple snapshots by their IDs.
 
@@ -988,7 +988,7 @@ def expire_snapshots_by_ids(self, snapshot_ids: List[int]) -> "ExpireSnapshots":
             self.expire_snapshot_by_id(snapshot_id)
         return self
 
-    def expire_snapshots_older_than(self, timestamp_ms: int) -> "ExpireSnapshots":
+    def older_than(self, timestamp_ms: int) -> "ExpireSnapshots":
         """
         Expire all unprotected snapshots with a timestamp older than a given value.