Issue #3339657 by phenaproxima, tedbow: Always show summary of validation result if exists

src/Form/UpdateFormBase.php

src/Validation/AdminStatusCheckMessages.php

src/Validation/StatusCheckRequirements.php

src/Validation/ValidationResultDisplayTrait.php

tests/src/Functional/StatusCheckTest.php

tests/src/Functional/UpdateErrorTest.php

tests/src/Functional/UpdateWarningTest.php

tests/src/Functional/UpdaterFormTestBase.php

tests/src/Kernel/ValidationResultDisplayTraitTest.php