Revert to the old test logic

which, in case of errors, will fail with a timeout but kairos service
doesn't allow us to know when the installer is done. That's because
the service has `RemainAfterExit=yes` and even if that was removed, the
kairos process waits for user input to finish:

```
Installation completed, press enter to go back to the shell. [Yes/no/all/cancel]
```

so there is not sure way to tell whether the kairos installer failed
with or without errors.

Signed-off-by: Dimitris Karakasilis <[email protected]>

tests/assets/live-overlay.tmpl

@@ -4,7 +4,7 @@ debug: true
 
 install:
   auto: true
-  reboot: false
+  reboot: true
   device: auto
   grub_options:
     extra_cmdline: foobarzz

tests/bundles_test.go

@@ -30,9 +30,6 @@ var _ = Describe("kairos bundles test", Label("bundles-test"), func() {
 		BeforeEach(func() {
 			expectDefaultService(vm)
 			expectStartedInstallation(vm)
-			expectInstallationFinished(vm)
-			expectInstallationNotFailed(vm)
-			vm.Sudo("reboot")
 			expectRebootedToActive(vm)
 		})
 

tests/tests_suite_test.go

@@ -292,27 +292,6 @@ func expectStartedInstallation(vm VM) {
 	})
 }
 
-func expectInstallationFinished(vm VM) {
-	By("checking that installation has finished", func() {
-		Eventually(func() string {
-			out, _ := vm.Sudo("systemctl status kairos")
-			return out
-		}, 30*time.Minute, 1*time.Second).ShouldNot(MatchRegexp("Active: activating"))
-	})
-}
-
-func expectInstallationNotFailed(vm VM) {
-	By("checking that installation didn't fail", func() {
-		sysOut, sysErr := vm.Sudo("systemctl status kairos")
-
-		journalOut, journalErr := vm.Sudo("journalctl -u kairos")
-		Expect(journalErr).ToNot(HaveOccurred())
-
-		Expect(sysErr).ToNot(HaveOccurred(), journalOut)
-		Expect(sysOut).ToNot(MatchRegexp("Active: failed"), journalOut)
-	})
-}
-
 func expectRebootedToActive(vm VM) {
 	By("checking that vm has rebooted to 'active'", func() {
 		Eventually(func() string {