Revert "Avoid loading plugins that do not match the current plugin api even during installation"
Revert "Avoid loading plugins that do not match the current plugin api even during installation"

This reverts commit 21f5933e0170b9673108f05df262dbc7f98cce69.

Commit 21f5933e breaks fresh installations of cakephp applications, or
any project where a dependency uses a different composer plugin
installer than the upstream project.

Closes auraphp/Aura.Intl#20

johnstevenson/composer,till/composer,balbuf/composer,floverdevel/composer,phansys/composer,staabm/composer,SpacePossum/composer,nicolas-grekas/composer,remicollet/composer,davidolrik/composer,naderman/composer,milleruk/composer,pierredup/composer,curry684/composer,alcohol/composer,andrerom/composer,Soullivaneuh/composer,JBleijenberg/composer,vdm-io/composer,fabpot/composer,MoT3rror/composer,fabiang/composer,gencer/composer,stefangr/composer,javihgil/composer,nevvermind/composer,stof/composer,localheinz/composer,dzuelke/composer,jreinke/composer,composer/composer,hirak/composer,yaman-jain/composer,slbmeh/composer,erasys/composer