Breaking change to fix JSONValue usage for CloudWatch Evidently. (#4415)

Introduces a breaking change for following parameters from a JSONValue to string type, because the SDKs JSONValue is not compatible with the service's request and response shapes.

EvaluateFeatureInput.EvaluationContext
EvaluateFeatureOutput.Details
EvaluationRequest.EvaluationContext
EvaluationResult.Details
Event.Data
ExperimentReport.Content
MetricDefinition.EventPattern
MetricDefinitionConfig.EventPattern

Author: skmcgrail

CHANGELOG_PENDING.md

@@ -3,3 +3,12 @@
 ### SDK Enhancements
 
 ### SDK Bugs
+* `service/cloudwatchevidently`: Introduces a breaking change for following parameters from a JSONValue to string type, because the SDKs JSONValue is not compatible with the service's request and response shapes.
+  * `EvaluateFeatureInput.EvaluationContext` 
+  * `EvaluateFeatureOutput.Details`
+  * `EvaluationRequest.EvaluationContext`
+  * `EvaluationResult.Details`
+  * `Event.Data`
+  * `ExperimentReport.Content`
+  * `MetricDefinition.EventPattern`
+  * `MetricDefinitionConfig.EventPattern`

private/model/api/legacy_jsonvalue.go

@@ -32,56 +32,6 @@ var legacyJSONValueShapes = map[string]map[string]legacyJSONValues{
 			},
 		},
 	},
-	"cloudwatchevidently": map[string]legacyJSONValues{
-		"EvaluateFeatureRequest": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"evaluationContext": struct{}{},
-			},
-		},
-		"EvaluateFeatureResponse": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"details": struct{}{},
-			},
-		},
-		"EvaluationRequest": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"evaluationContext": struct{}{},
-			},
-		},
-		"EvaluationResult": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"details": struct{}{},
-			},
-		},
-		"Event": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"data": struct{}{},
-			},
-		},
-		"ExperimentReport": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"content": struct{}{},
-			},
-		},
-		"MetricDefinition": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"eventPattern": struct{}{},
-			},
-		},
-		"MetricDefinitionConfig": legacyJSONValues{
-			Type: "structure",
-			StructMembers: map[string]struct{}{
-				"eventPattern": struct{}{},
-			},
-		},
-	},
 	"cloudwatchrum": map[string]legacyJSONValues{
 		"RumEvent": legacyJSONValues{
 			Type: "structure",