v5.70.0-upjet.1

Release of the terraform-provider-aws v5.70.0 with Upbound modifications.

What's Changed

• Prepare upjet v5.70.0 by @turkenf in #274
• Implement deprecated diagnostic helper function locally by @mergenci in #275

Full Changelog: https://github.com/upbound/terraform-provider-aws/commits/v5.70.0-upjet.1