Support BigQuery search indexes

[jawnsy]

TL;DR

BigQuery recently added search index support: https://cloud.google.com/bigquery/docs/search-index and it would be nice to have this module manage our search indices

Terraform Resources

No response

Detailed design

No response

Additional information

I believe this requires changes to the provider to add this support first, so have created an issue there as well: https://github.com/hashicorp/terraform-provider-google/issues/12388

[bharathkkb]

Thanks for the request @jawnsy Happy to prioritize once landed in TPG.