Fix skipping DANGER/ERROR endpoint test validation

Author: kstich

smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/traits/EndpointTestsTraitValidator.java

@@ -68,6 +68,8 @@ public List<ValidationEvent> validate(Model model) {
                                     || event.getSeverity() == Severity.NOTE
                                     || testCase.getExpect().getError().isPresent()) {
                                 events.add(event.toBuilder().severity(Severity.DANGER).build());
+                            } else {
+                                events.add(event);
                             }
                         }
                     }

smithy-rules-engine/src/test/resources/software/amazon/smithy/rulesengine/traits/errorfiles/missing-input-target.errors

@@ -1,2 +1,3 @@
 [WARNING] smithy.example#InvalidService: This shape applies a trait that is unstable: smithy.rules#endpointTests | UnstableTrait
 [DANGER] smithy.example#InvalidService: The operationInput value for an endpoint test does not match the operation's input shape: Invalid structure member `fizz` found for `smithy.example#GetThingInput` | EndpointTestsTrait.smithy.example#GetThingInput.fizz
+[ERROR] smithy.example#InvalidService: The operationInput value for an endpoint test does not match the operation's input shape.buzz: Expected string value for string shape, `smithy.api#String`; found number value, `1` | EndpointTestsTrait

smithy-rules-engine/src/test/resources/software/amazon/smithy/rulesengine/traits/errorfiles/missing-input-target.smithy

@@ -19,7 +19,7 @@ apply InvalidService @endpointTests({
             operationInputs: [
                 {
                     operationName: "GetThing"
-                    operationParams: { fizz: "something", buzz: "a buzz value" }
+                    operationParams: { fizz: "something", buzz: 1 }
                 }
             ]
             expect: {