fix: Empty string handling (#2296)

* fix: Empty string handling

* fix: Optimize empty string

Author: gitmkn

.changelog/2296.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+tencentcloud_ckafka_datahub_task: Optimize `input_value_type` and `input_value` empty string processing
+```

tencentcloud/resource_tc_ckafka_datahub_task.go

@@ -6530,10 +6530,10 @@ func resourceTencentCloudCkafkaDatahubTaskCreate(d *schema.ResourceData, meta in
 					if v, ok := analyseMap["regex"]; ok {
 						analyseParam.Regex = helper.String(v.(string))
 					}
-					if v, ok := analyseMap["input_value_type"]; ok {
+					if v, ok := analyseMap["input_value_type"]; ok && v != "" {
 						analyseParam.InputValueType = helper.String(v.(string))
 					}
-					if v, ok := analyseMap["input_value"]; ok {
+					if v, ok := analyseMap["input_value"]; ok && v != "" {
 						analyseParam.InputValue = helper.String(v.(string))
 					}
 					fieldParam.Analyse = &analyseParam