Not creating explicit record locks will speed up the test.
Also, disable the use of InnoDB persistent statistics in the test of
MDEV-27270 to avoid intermittent failures in 10.6 or later
(after commit 9608773f75)
due to the nondeterministic scheduling of STATS_AUTO_PERSISTENT.
Extend the fix for MDEV-25858 to handle non-reverse-ordered ORDER BY:
If test_if_skip_sort_order() decides to use an index to produce rows
in the required ordering, it should disable "Range Checked for Each Record".
The fix needs to be backported to earlier versions.
* preserve DESC index property in the parser
* store it in the frm (only for HA_KEY_ALG_BTREE)
* read it from the frm
* show it in SHOW CREATE
* skip DESC indexes in opt_range.cc and opt_sum.cc
* ORDER BY test
This includes a fix of MDEV-27432.
