Apply parts of T310437 to wmf wikis
# **ALTERs to run:** https://gerrit.wikimedia.org/r/c/mediawiki/extensions/FlaggedRevs/+/804753/2/backend/schema/mysql/patch-flaggedpages-timestamp.sql
# **Where to run those changes:** https://noc.wikimedia.org/conf/highlight.php?file=dblists/flaggedrevs.dblist
# **When to run those changes:** any time
# **If the schema change is backwards compatible:** Yes
# **If the schema change has been tested already on some of the test/beta wikis:** not running on beta
# **if the data should be made available on the labs replicas and/or dumps:** no change of the existing rules
Progress:
[] s1: Done except on master
[x] s2: Done
[x] s3: Done
[x] s4: NA
[] s5: Done except on master
[] s6: Done except on master
[] s7: Done except on master
[x] s8: NA
[x] labstestwiki: NA