fix(logs): query strings can have multiple stats commands (#34590)

### Issue #34578

Closes #34578

### Checklist
- [ ] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: msambol

packages/@aws-cdk-testing/framework-integ/test/aws-logs/test/integ.save-logs-insights-query-definition.js.snapshot/LogsInsightsQueryDefinitionIntegTestDefaultTestDeployAssert902BAAD5.assets.json

@@ -11,25 +11,25 @@
   "QueryDefinition4190BC36": {
    "Type": "AWS::Logs::QueryDefinition",
    "Properties": {
-    "Name": "QueryDefinition",
-    "QueryString": "fields @timestamp, @message\n| parse @message \"[*] *\" as loggingType, loggingMessage\n| filter loggingType = \"ERROR\"\n| sort @timestamp desc\n| limit 20\n| display loggingMessage",
     "LogGroupNames": [
      {
       "Ref": "LogGroupF5B46931"
      }
-    ]
+    ],
+    "Name": "QueryDefinition",
+    "QueryString": "fields @timestamp, @message\n| parse @message \"[*] *\" as loggingType, loggingMessage\n| filter loggingType = \"ERROR\"\n| stats count(loggingMessage) as loggingErrors\n| sort @timestamp desc\n| limit 20\n| display loggingMessage"
    }
   },
   "QueryDefinitionWithMultipleStatements58A3EF74": {
    "Type": "AWS::Logs::QueryDefinition",
    "Properties": {
-    "Name": "QueryDefinitionWithMultipleStatements",
-    "QueryString": "fields @timestamp, @message\n| parse @message \"[*] *\" as loggingType, loggingMessage\n| parse @message \"<*>: *\" as differentLoggingType, differentLoggingMessage\n| filter loggingType = \"ERROR\"\n| filter loggingMessage = \"A very strange error occurred!\"\n| sort @timestamp desc\n| limit 20\n| display loggingMessage",
     "LogGroupNames": [
      {
       "Ref": "LogGroupF5B46931"
      }
-    ]
+    ],
+    "Name": "QueryDefinitionWithMultipleStatements",
+    "QueryString": "fields @timestamp, @message\n| parse @message \"[*] *\" as loggingType, loggingMessage\n| parse @message \"<*>: *\" as differentLoggingType, differentLoggingMessage\n| filter loggingType = \"ERROR\"\n| filter loggingMessage = \"A very strange error occurred!\"\n| stats count(loggingMessage) as loggingErrors\n| stats count(differentLoggingMessage) as differentLoggingErrors\n| sort @timestamp desc\n| limit 20\n| display loggingMessage"
    }
   }
  },

packages/@aws-cdk-testing/framework-integ/test/aws-logs/test/integ.save-logs-insights-query-definition.js.snapshot/aws-cdk-logs-insights-querydefinition-integ.assets.json

@@ -11,21 +11,22 @@ class LogsInsightsQueryDefinitionIntegStack extends Stack {
       removalPolicy: RemovalPolicy.DESTROY,
     });
 
-    // Test query creation with single parse and filter statements
+    // Test query creation with single parse, filter, and sort statements
     new QueryDefinition(this, 'QueryDefinition', {
       queryDefinitionName: 'QueryDefinition',
       queryString: new QueryString({
         fields: ['@timestamp', '@message'],
         parse: '@message "[*] *" as loggingType, loggingMessage',
         filter: 'loggingType = "ERROR"',
+        stats: 'count(loggingMessage) as loggingErrors',
         sort: '@timestamp desc',
         limit: 20,
         display: 'loggingMessage',
       }),
       logGroups: [logGroup],
     });
 
-    // Test query creation with multiple parse and filter statements
+    // Test query creation with multiple parse, filter, and stats statements
     new QueryDefinition(this, 'QueryDefinitionWithMultipleStatements', {
       queryDefinitionName: 'QueryDefinitionWithMultipleStatements',
       queryString: new QueryString({
@@ -38,6 +39,10 @@ class LogsInsightsQueryDefinitionIntegStack extends Stack {
           'loggingType = "ERROR"',
           'loggingMessage = "A very strange error occurred!"',
         ],
+        statsStatements: [
+          'count(loggingMessage) as loggingErrors',
+          'count(differentLoggingMessage) as differentLoggingErrors',
+        ],
         sort: '@timestamp desc',
         limit: 20,
         display: 'loggingMessage',