[FIX] email_template: allow override of in new API
[FIX] email_template: allow override of in new API

If context is passed as a non-keyword argument to a new-API override of this
method, it ends up as the positional fields argument.

Closes #9911

vnsofthe/odoo,dfang/odoo,CatsAndDogsbvba/odoo,stephen144/odoo,dfang/odoo,makinacorpus/odoo,sysadminmatmoz/OCB,leorochael/odoo,odootr/odoo,provaleks/o8,Endika/odoo,CatsAndDogsbvba/odoo,mustafat/odoo-1,BT-ojossen/odoo,storm-computers/odoo,stephen144/odoo,markeTIC/OCB,Endika/OpenUpgrade,diagramsoftware/odoo,BT-rmartin/odoo,vnsofthe/odoo,BT-ojossen/odoo,ygol/odoo,spadae22/odoo,eino-makitalo/odoo,datenbetrieb/odoo,funkring/fdoo,Nowheresly/odoo,CatsAndDogsbvba/odoo,markeTIC/OCB,jfpla/odoo,sysadminmatmoz/OCB,synconics/odoo,laslabs/odoo,Noviat/odoo,spadae22/odoo,hip-odoo/odoo,glovebx/odoo,microcom/odoo,NeovaHealth/odoo,Antiun/odoo,tvibliani/odoo,storm-computers/odoo,rubencabrera/odoo,bplancher/odoo,hassoon3/odoo,grap/OpenUpgrade,microcom/odoo,jfpla/odoo,jfpla/odoo,BT-rmartin/odoo,laslabs/odoo,Antiun/odoo,synconics/odoo,NeovaHealth/odoo,ygol/odoo,BT-rmartin/odoo,glovebx/odoo,grap/OpenUpgrade,spadae22/odoo,dfang/odoo,diagramsoftware/odoo,bplancher/odoo,NeovaHealth/odoo,datenbetrieb/odoo,alexcuellar/odoo,factorlibre/OCB,ehirt/odoo,Endika/odoo,hassoon3/odoo,grap/OpenUpgrade,OpenUpgrade/OpenUpgrade,Noviat/odoo,funkring/fdoo,rubencabrera/odoo,odootr/odoo,synconics/odoo,draugiskisprendimai/odoo,storm-computers/odoo,leorochael/odoo,Endika/OpenUpgrade,bplancher/odoo,provaleks/o8,rubencabrera/odoo,dfang/odoo,jiangzhixiao/odoo,MarcosCommunity/odoo,funkring/fdoo,diagramsoftware/odoo,Adel-Magebinary/odoo,Endika/odoo,shingonoide/odoo,OpenUpgrade/OpenUpgrade,tvibliani/odoo,ehirt/odoo,sysadminmatmoz/OCB,hip-odoo/odoo,mustafat/odoo-1,jfpla/odoo,markeTIC/OCB,sergio-incaser/odoo,stephen144/odoo,markeTIC/OCB,bplancher/odoo,MarcosCommunity/odoo,factorlibre/OCB,BT-rmartin/odoo,Elico-Corp/odoo_OCB,Adel-Magebinary/odoo,provaleks/o8,leorochael/odoo,ehirt/odoo,spadae22/odoo,glovebx/odoo,Endika/OpenUpgrade,laslabs/odoo,Daniel-CA/odoo,ygol/odoo,Endika/odoo,ehirt/odoo,funkring/fdoo,eino-makitalo/odoo,Daniel-CA/odoo,odootr/odoo,BT-ojossen/odoo,sergio-incaser/odoo,Noviat/odoo,Endika/OpenUpgrade,laslabs/odoo,alexcuellar/odoo,factorlibre/OCB,OpenUpgrade/OpenUpgrade,mustafat/odoo-1,microcom/odoo,Antiun/odoo,mustafat/odoo-1,sergio-incaser/odoo,NeovaHealth/odoo,synconics/odoo,MarcosCommunity/odoo,hassoon3/odoo,shingonoide/odoo,dfang/odoo,Antiun/odoo,vnsofthe/odoo,funkring/fdoo,MarcosCommunity/odoo,Nowheresly/odoo,jiangzhixiao/odoo,tvibliani/odoo,Adel-Magebinary/odoo,glovebx/odoo,Nowheresly/odoo,datenbetrieb/odoo,tvibliani/odoo,shingonoide/odoo,grap/OpenUpgrade,provaleks/o8,datenbetrieb/odoo,vnsofthe/odoo,draugiskisprendimai/odoo,alexcuellar/odoo,leorochael/odoo,hip-odoo/odoo,Endika/OpenUpgrade,MarcosCommunity/odoo,OpenUpgrade/OpenUpgrade,alexcuellar/odoo,makinacorpus/odoo,factorlibre/OCB,provaleks/o8,Endika/odoo,Nowheresly/odoo,odootr/odoo,shingonoide/odoo,vnsofthe/odoo,rubencabrera/odoo,CatsAndDogsbvba/odoo,Noviat/odoo,ygol/odoo,funkring/fdoo,sergio-incaser/odoo,Endika/odoo,factorlibre/OCB,shingonoide/odoo,hassoon3/odoo,stephen144/odoo,Adel-Magebinary/odoo,vnsofthe/odoo,Noviat/odoo,makinacorpus/odoo,jiangzhixiao/odoo,Noviat/odoo,NeovaHealth/odoo,glovebx/odoo,jfpla/odoo,Daniel-CA/odoo,hip-odoo/odoo,MarcosCommunity/odoo,microcom/odoo,dfang/odoo,bplancher/odoo,grap/OpenUpgrade,sysadminmatmoz/OCB,Antiun/odoo,BT-ojossen/odoo,sergio-incaser/odoo,datenbetrieb/odoo,Daniel-CA/odoo,draugiskisprendimai/odoo,stephen144/odoo,OpenUpgrade/OpenUpgrade,NeovaHealth/odoo,ehirt/odoo,glovebx/odoo,synconics/odoo,factorlibre/OCB,BT-rmartin/odoo,mustafat/odoo-1,stephen144/odoo,sysadminmatmoz/OCB,makinacorpus/odoo,Endika/OpenUpgrade,Endika/odoo,leorochael/odoo,factorlibre/OCB,Nowheresly/odoo,Antiun/odoo,jiangzhixiao/odoo,CatsAndDogsbvba/odoo,storm-computers/odoo,makinacorpus/odoo,alexcuellar/odoo,funkring/fdoo,markeTIC/OCB,leorochael/odoo,eino-makitalo/odoo,draugiskisprendimai/odoo,storm-computers/odoo,MarcosCommunity/odoo,makinacorpus/odoo,ehirt/odoo,MarcosCommunity/odoo,jiangzhixiao/odoo,CatsAndDogsbvba/odoo,microcom/odoo,Adel-Magebinary/odoo,ehirt/odoo,leorochael/odoo,draugiskisprendimai/odoo,alexcuellar/odoo,draugiskisprendimai/odoo,provaleks/o8,eino-makitalo/odoo,hassoon3/odoo,hip-odoo/odoo,mustafat/odoo-1,OpenUpgrade/OpenUpgrade,shingonoide/odoo,Adel-Magebinary/odoo,hassoon3/odoo,Daniel-CA/odoo,makinacorpus/odoo,Endika/OpenUpgrade,laslabs/odoo,markeTIC/OCB,tvibliani/odoo,Elico-Corp/odoo_OCB,glovebx/odoo,ygol/odoo,Daniel-CA/odoo,datenbetrieb/odoo,vnsofthe/odoo,Noviat/odoo,jfpla/odoo,diagramsoftware/odoo,odootr/odoo,rubencabrera/odoo,odootr/odoo,synconics/odoo,Adel-Magebinary/odoo,spadae22/odoo,BT-ojossen/odoo,OpenUpgrade/OpenUpgrade,BT-ojossen/odoo,synconics/odoo,grap/OpenUpgrade,CatsAndDogsbvba/odoo,rubencabrera/odoo,BT-rmartin/odoo,jiangzhixiao/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,laslabs/odoo,Elico-Corp/odoo_OCB,shingonoide/odoo,BT-ojossen/odoo,sysadminmatmoz/OCB,mustafat/odoo-1,spadae22/odoo,eino-makitalo/odoo,provaleks/o8,diagramsoftware/odoo,eino-makitalo/odoo,ygol/odoo,spadae22/odoo,datenbetrieb/odoo,tvibliani/odoo,Nowheresly/odoo,jfpla/odoo,Elico-Corp/odoo_OCB,diagramsoftware/odoo,grap/OpenUpgrade,sergio-incaser/odoo,jiangzhixiao/odoo,Antiun/odoo,NeovaHealth/odoo,Elico-Corp/odoo_OCB,Nowheresly/odoo,odootr/odoo,rubencabrera/odoo,alexcuellar/odoo,ygol/odoo,BT-rmartin/odoo,hip-odoo/odoo,bplancher/odoo,storm-computers/odoo,markeTIC/OCB,microcom/odoo,draugiskisprendimai/odoo,diagramsoftware/odoo,eino-makitalo/odoo,Daniel-CA/odoo,tvibliani/odoo