ci: Remove the package version from the job name.

Match Hydra behaviour where the job_name is <package_name>.<system>. This
allows to operate on several builds of the same package in the CI, regardless
of their version.

* gnu/ci.scm (job-name): Remove package version from the job name.

gnu/ci.scm

@@ -412,8 +412,7 @@ all its dependencies, and ready to be installed on \"foreign\" distributions.")
 
 (define job-name
   ;; Return the name of a package's job.
-  (compose string->symbol
-           (cut package-full-name <> "-")))
+  (compose string->symbol package-name))
 
 (define package->job
   (let ((base-packages