In commit 9bc874a5 (MDEV-23497)
the configuration option innodb_read_only_compressed was introduced
to giver users advance notice of a plan to remove ROW_FORMAT=COMPRESSED
support for InnoDB.

Based on user feedback, this plan has been scrapped.
Even though ROW_FORMAT=COMPRESSED is a dead end and causes some
overhead for InnoDB data structures, we can live with that.

Now that we know that some users really want to keep using
ROW_FORMAT=COMPRESSED, the previous default value of the parameter
innodb_read_only_compressed=ON should be changed to OFF, to allow
smooth upgrades to 10.6 and later versions, without requiring users
to update any configuration file.