gitlab: Move current job set to qemu-project.yml

gitlab: Move current job set to qemu-project.yml

To allow forks to easily decide which jobs they want to run,
but without disrupting the current default, move the current
set of jobs to a new file corresponding to the jobs run by
the mainstream project CI:
https://gitlab.com/qemu-project/qemu/-/pipelines

Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210511072952.2813358-11-f4bug@amsat.org>