[et] Allow disabling the "cute" output mode, so folks can grep the logs #147903
Description
Forked from #145711 (comment).
It should be reasonable to do something like:
et build --verbose | grep <something>We could make this yet-another flag, i.e. --no-animations, but I think verbose implying it is also fine?
Wdut?
/cc @gaaclarke