new testimage and systemd-image

Simply because it's been a while since the last testimage
build, and I want to confirm that our image build process
still works.

Added /home/podman/healthcheck. This saves us having to
podman-build on each healthcheck test. Removed now-
unneeded _build_health_check_image helper.

testimage: bump alpine 3.16.2 to 3.19.0

systemd-image: f38 to f39
  - tzdata now requires dnf **install**, not reinstall
    (this is exactly the sort of thing I was looking for)

PROBLEMS DISCOVERED:
  - in e2e, fedoraMinimal is now == SYSTEMD_IMAGE. This
    screws up some of the image-count tests (CACHE_IMAGES).

  - "alter tarball" system test now barfs with tar < 1.35.

TODO: completely replace fedoraMinimal with SYSTEMD_IMAGE
in all tests.

Signed-off-by: Ed Santiago <santiago@redhat.com>

test/e2e/rmi_test.go

@@ -214,7 +214,7 @@ var _ = Describe("Podman rmi", func() {
 		session = podmanTest.Podman([]string{"images", "-q", "-a"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(ExitCleanly())
-		Expect(session.OutputToString()).To(HaveLen(142))
+		Expect(session.OutputToStringArray()).To(HaveLen(len(CACHE_IMAGES)))
 	})
 
 	It("podman rmi -a with no images should be exit 0", func() {