feat(hosted): add BYOK argument for ec_deployment resource

[dmitry-pisarev-writerai]

Description

This change depends on elastic/cloud-sdk-go#502

Adding byok_arn argument for ec_deployment resource to enable deployment creation encrypted with CMK.

Related Issues

#827

Motivation and Context

Need to create an elasticsearch deployment with help of Terraform, and have this deployment encrypted with a customer key (e.g. AWS KMS).

How Has This Been Tested?

With custom build of terraform-provider-ec able to create hosted elasticsearch deployment encrypted with our own AWS KMS key.

resource "ec_deployment" "this" {
  name = var.name

  region                     = var.region
  version                    = local.version
  deployment_template_id     = var.deployment_template_id
  migrate_to_latest_hardware = true
  byok_arn                   = var.byok_arn
...

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (improves code quality but has no user-facing effect)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation

Readiness Checklist

• My code follows the code style of this project
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

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