Submodule custom_roles_iam change permission and member field to optional

[minzetaos]

TL;DR

When user defines a role using base_roles field, there is actually no need to have a redundant permission field. Also, there is no need to force user to add member, when creating a role

Terraform Resources

No response

Detailed design

Just need to simply add default = [] in variables.tf to these two variables I mentioned above and problem solved.

variable "permissions" {
  type        = list(string)
  description = "IAM permissions assigned to Custom Role."
  default     = []
}

variable "members" {
  description = "List of members to be added to custom role."
  type        = list(string)
  default     = []
}

Additional information

No response