test: collect coverage in a couple more codepaths

Otherwise we'd miss coverage from TEST-{02,24,61}, since they don't go
through the "standard" `check_result_common` hook.

Follow-up to 7bf20e48bd.

test/TEST-24-CRYPTSETUP/test.sh

@@ -28,6 +28,7 @@ check_result_qemu() {
     echo "${JOURNAL_LIST:-No journals were saved}"
 
     test -s "$TESTDIR/failed" && ret=1
+    check_coverage_reports "${initdir:?}" || ret=5
     return $ret
 }
 

test/test-functions

@@ -1458,6 +1458,7 @@ check_result_nspawn_unittests() {
     fi
 
     get_bool "${TIMED_OUT:=}" && ret=1
+    check_coverage_reports "$workspace" || ret=5
 
     save_journal "$workspace/var/log/journal" $ret
 
@@ -1490,6 +1491,7 @@ check_result_qemu_unittests() {
     fi
 
     get_bool "${TIMED_OUT:=}" && ret=1
+    check_coverage_reports "$initdir" || ret=5
 
     save_journal "$initdir/var/log/journal" $ret