fix: Change aws_cloudwatch_event_rule pattern size to 4096

.changelog/34270.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+resource/aws_cloudwatch_event_rule: Increase `event_pattern` max length for validation to 4096
+```

internal/service/events/rule.go

@@ -375,7 +375,7 @@ func validateEventPatternValue() schema.SchemaValidateFunc {
 		}
 
 		// Check whether the normalized JSON is within the given length.
-		const maxJSONLength = 2048
+		const maxJSONLength = 4096
 		if len(json) > maxJSONLength {
 			errors = append(errors, fmt.Errorf("%q cannot be longer than %d characters: %q", k, maxJSONLength, json))
 		}

website/docs/r/cloudwatch_event_rule.html.markdown

@@ -65,7 +65,7 @@ This resource supports the following arguments:
 * `schedule_expression` - (Optional) The scheduling expression. For example, `cron(0 20 * * ? *)` or `rate(5 minutes)`. At least one of `schedule_expression` or `event_pattern` is required. Can only be used on the default event bus. For more information, refer to the AWS documentation [Schedule Expressions for Rules](https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/ScheduledEvents.html).
 * `event_bus_name` - (Optional) The name or ARN of the event bus to associate with this rule.
   If you omit this, the `default` event bus is used.
-* `event_pattern` - (Optional) The event pattern described a JSON object. At least one of `schedule_expression` or `event_pattern` is required. See full documentation of [Events and Event Patterns in EventBridge](https://docs.aws.amazon.com/eventbridge/latest/userguide/eventbridge-and-event-patterns.html) for details.
+* `event_pattern` - (Optional) The event pattern described a JSON object. At least one of `schedule_expression` or `event_pattern` is required. See full documentation of [Events and Event Patterns in EventBridge](https://docs.aws.amazon.com/eventbridge/latest/userguide/eventbridge-and-event-patterns.html) for details. **Note**: The event pattern size is 2048 by default but it is adjustable up to 4096 characters by submitting a service quota increase request. See [Amazon EventBridge quotas](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-quota.html) for details.
 * `description` - (Optional) The description of the rule.
 * `role_arn` - (Optional) The Amazon Resource Name (ARN) associated with the role that is used for target invocation.
 * `is_enabled` - (Optional) Whether the rule should be enabled (defaults to `true`).