Fix deprecation warning(deprecate managed_policy_arns argument)

[ryosukes]

When applying the cloudwatch-logs-aggregator module, the following warning appears. I would like to resolve this:

Warning: Argument is deprecated

  with module.cw_logs_aggregator_lambda.aws_iam_role.this,
  on .terraform/modules/cw_logs_aggregator_lambda/cloudwatch-logs-aggregator/lambda/main.tf line 27, in resource "aws_iam_role" "this":
  27:   managed_policy_arns = ["arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"]

The managed_policy_arns argument is deprecated. Use the
aws_iam_role_policy_attachments_exclusive resource instead.

(and one more similar warning elsewhere)

• r/aws_iam_role_policy_attachments_exclusive: new resource hashicorp/terraform-provider-aws#39718

[ne-sachirou]

Thank you for reporting the problem. We will fix the issue.