fix(接口测试): 后置脚本中，是否引用公共脚本无法保存成功

backend/services/project-management/src/main/java/io/metersphere/project/api/assertion/MsScriptAssertion.java

@@ -46,7 +46,6 @@ public class MsScriptAssertion extends MsAssertion {
         }
     }
 
-    @JsonIgnore
     public boolean isEnableCommonScript() {
         return BooleanUtils.isTrue(enableCommonScript);
     }

backend/services/project-management/src/main/java/io/metersphere/project/api/processor/ScriptProcessor.java

@@ -54,7 +54,6 @@ public class ScriptProcessor extends MsProcessor {
         }
     }
 
-    @JsonIgnore
     public boolean isEnableCommonScript() {
         return BooleanUtils.isTrue(enableCommonScript);
     }

backend/services/project-management/src/main/java/io/metersphere/project/service/FileAssociationService.java

@@ -296,6 +296,9 @@ public class FileAssociationService {
         Map<String,String> fileIdMap = new HashMap<>();
         for (FileAssociation fileAssociation:fileAssociationList){
             FileAssociationSource source  = extFileAssociationMapper.selectNameBySourceTableAndId(FileAssociationSourceUtil.getQuerySql(fileAssociation.getSourceType()),fileAssociation.getSourceId());
+            if (source == null) {
+                continue;
+            }
             this.validateSourceName(source);
             String fileName = null;
             if(fileIdMap.containsKey(fileAssociation.getFileId())){