Bug 1923663, part 2 - Re-enable CHIPS beyond nightly, done with database migrations - r=valentin,edgul

Depends on D225692

Differential Revision: https://phabricator.services.mozilla.com/D226943

modules/libpref/init/StaticPrefList.yaml

@@ -12378,7 +12378,7 @@
 # Whether to support CHIPS(Cookies Having Independent Partitioned State).
 - name: network.cookie.CHIPS.enabled
   type: RelaxedAtomicBool
-  value: @IS_NIGHTLY_BUILD@
+  value: true
   mirror: always
 
 # Updated to match the target count when we migrate the unpartitioned CHIPS
@@ -12392,7 +12392,7 @@
 # This lets us remotely perform a database migration with Nimbus.
 - name: network.cookie.CHIPS.migrateDatabaseTarget
   type: RelaxedAtomicUint32
-  value: 0
+  value: 1
   mirror: always
 
 # Stale threshold for cookies in seconds.