[debug] syntax highlight SQL and RQL debug output
This prevent DBG_RQL and DBG_SQL output to looks like a gigantic blob of white
text.
Do this only if we detect that we are in a tty and that pygments is installed.
Closes #17222885
### Requirements for tests in various cubicweb/**/test directories. ###
## shared by several test folders
docutils
webtest
## cubicweb/test
Pygments
pycryptodomex
#fyzz XXX pip install fails
## cubicweb/devtools/test
flake8
## cubicweb/hooks/test
psycopg2-binary
## cubicweb/pyramid/test
pyramid >= 1.5.0
waitress >= 0.8.9
wsgicors >= 0.3
pyramid_multiauth
repoze.lru
## cubicweb/sobject/test