Features

• Add IAM to low-level API client
  • Add BigtableTableAdminClient#get_iam_policy
  • Add BigtableTableAdminClient#set_iam_policy
  • Add BigtableTableAdminClient#test_iam_permissions

Documentation

• Update low-level IAM documentation
  • Update GetPolicyOption#requested_policy_version docs
  • Un-deprecate Policy#version