Before this commit, the t-lang on a t-call was not
propagated into the context's of the callee template
It resulted into mismatch translation and formatting in the final
rendered template
i.e. having a t-esc with a qweb widget float would take the wrong float format
After this commit, the t-lang parameter alters the context of the template
and t-esc with widgets are translated
OPW 1939989
closesodoo/odoo#31291