fix(policy-store): [#trace-foss-970] remove superfluous code

- JsonProperty is not needed at all (removed for consistency with the other attributes)
- removed superfluous brackets in annotation with only value

(works implicitly as with the other attributes)

irs-edc-client/src/main/java/org/eclipse/tractusx/irs/edc/client/policy/Constraint.java

@@ -24,7 +24,6 @@
 package org.eclipse.tractusx.irs.edc.client.policy;
 
 import com.fasterxml.jackson.annotation.JsonAlias;
-import com.fasterxml.jackson.annotation.JsonProperty;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -39,14 +38,13 @@
 public class Constraint {
 
     @Schema(implementation = String.class, example = "string")
-    @JsonAlias({ "odrl:leftOperand" })
+    @JsonAlias("odrl:leftOperand")
     private String leftOperand;
     @JsonAlias("odrl:operator")
     @Schema
     private Operator operator;
     @Schema(implementation = String.class, example = "string")
     @JsonAlias("odrl:rightOperand")
-    @JsonProperty("rightOperand")
     private String rightOperand;
 
 }