DSRE 1639 (#6522)

* Set retention to 25 months on firefox_desktop_derived.pageload_1pct_v1

* Set retention to 25 months on firefox_desktop_derived.pageload_nightly_v1

sql/moz-fx-data-shared-prod/firefox_desktop_derived/pageload_1pct_v1/metadata.yaml

@@ -16,9 +16,8 @@ bigquery:
     type: day
     field: submission_timestamp
     require_partition_filter: true
-    expiration_days: null
+    expiration_days: 780
   range_partitioning: null
-  expiration_days: 780
   clustering:
     fields:
     - normalized_channel

sql/moz-fx-data-shared-prod/firefox_desktop_derived/pageload_nightly_v1/metadata.yaml

@@ -16,6 +16,6 @@ bigquery:
     type: day
     field: submission_timestamp
     require_partition_filter: true
-    expiration_days: null
+    expiration_days: 780
   range_partitioning: null
 references: {}