ci: simplify ci pipelines

5 jobs for pureos/amber-phone in 6 minutes and 26 seconds (queued for 1 second)
Status Job ID Name Coverage
  Package
passed #328669
librem5
package-pureos-amber

00:02:50

passed #328670
librem5:arm64
package-pureos-amber:arm64

00:06:26

 
  Test Package
passed #328671
librem5
autopkgtest-pureos-amber-package

00:01:04

passed #328673
librem5
check-tarball

00:01:01

passed #328672
librem5
lintian-pureos-amber-package

00:00:26