Call out that settings are not included during an index import (#1403)

Author: tobio

docs/resources/elasticsearch_index.md

@@ -195,7 +195,9 @@ Import is supported using the following syntax:
 The [`terraform import` command](https://developer.hashicorp.com/terraform/cli/commands/import) can be used, for example:
 
 ```shell
-# NOTE: while importing index resource, keep in mind, that some of the default index settings will be imported into the TF state too
-# You can later adjust the index configuration to account for those imported settings
+# Importing a index resource is minimal and may result in seemingly unnecessary plan changes. 
+# Index settings are *not* included in the import, and so any settings defined in the elasticstack_elasticsearch_index
+# resource definition will show up as an addition in the next `terraform plan` operation. 
+# Applying these settings 'changes' should be safe, resulting in no actual change to the backing index. 
 terraform import elasticstack_elasticsearch_index.my_index <cluster_uuid>/<index_name>
 ```

examples/resources/elasticstack_elasticsearch_index/import.sh

@@ -1,4 +1,6 @@
-# NOTE: while importing index resource, keep in mind, that some of the default index settings will be imported into the TF state too
-# You can later adjust the index configuration to account for those imported settings
+# Importing a index resource is minimal and may result in seemingly unnecessary plan changes. 
+# Index settings are *not* included in the import, and so any settings defined in the elasticstack_elasticsearch_index
+# resource definition will show up as an addition in the next `terraform plan` operation. 
+# Applying these settings 'changes' should be safe, resulting in no actual change to the backing index. 
 terraform import elasticstack_elasticsearch_index.my_index <cluster_uuid>/<index_name>