* Upgrade to log4j 2.13.3

Upgrades us to newer Log4j

Resolves #12719

* fixing reflection warnings

* reflection warning on test

* make tests work

took a while to figure out how to configure log4j properly
programatically - it's not as easy as log4j 1

add logging adapters for commons-logging, slf4j, liquibase, etc so that
all logging routes through log4j2 now

* appease the linters

* okay cljr-clean-ns makes this line too long, I get it

* add log4j2.xml config for Cypress tests

* update log4j configuration file documentation

update which flag is used by the backend tests

[ci all]

* update cheshire because clj-http updated

* Wire up the metabase-appender to Log4j2

This was brutal to figure out - log4j usually silently fails, so it took
finding the right combination of configuration settings and system
properties to get it to log enough to find out why the appender was
never invoked.