[FEATURE] opensearch_data_stream import

[arichtman-srt]

Is your feature request related to a problem?

Unable to manage existing data streams, have to delete and let Terraform create them

What solution would you like?

Support for terraform import on resource opensearch_data_stream

What alternatives have you considered?

Manually constructing the data stream resource in the state file.

Do you have any additional context?

https://registry.terraform.io/providers/opensearch-project/opensearch/latest/docs/resources/data_stream

[gaiksaya]

[Triage] Thank you @arichtman-srt for the issue. Looks like this is a good first issue if you like to take a look and contribute.