tests/fortran/7 generated: don't try to find a configure_file by path
tests/fortran/7 generated: don't try to find a configure_file by path

Use the value returned by configure file instead. The issue that caused
this to be required is no longer present.

pexip/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,pexip/meson,pexip/meson,mesonbuild/meson,pexip/meson,pexip/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson