* mysql_user: Match quotes, double quotes and backticks when checking current privileges
(cherry picked from commit 1ae0e2138332dad30f5bdd9a46d46b1abf9be868)
* Add changelog fragment for PR #40092
(cherry picked from commit 8974ce3c78557a4ea36b7c33b5dc9361bdea92a1)
* mysql_user: fix malformed regex used to check current privileges
