Use QMAKE_PROJECT_NAME for run configurations

Hello,

I have the same need as the issue described by QTCREATORBUG-13950.

Basically, the problem is that QtCreator uses the name of a .pro file to set the display name of its run configuration. It forces us to use redundant names for the folders that contain the source of our test executables, so one can quickly locate them in the MiniProjectTargetSelector of QtCreator.

Unfortunately, using `QMAKE_PROJECT_NAME` only renames the project node in the project tree hierarchy. Maybe it also worked in 2019 for run configurations but it was lost during a refactor?

Thank you and have a nice day.