Add possibility to forcefully destroy the backup vault

[v-bieliavtsev]

Describe the Feature

Please, add possibility to forcefully destroy the backup vault.
Add option force_destroy = var.backup_vault_force_destroy
Resource: aws_backup_vault

Expected Behavior

After passing the parameter backup_vault_force_destroy = true to module the backup vault should be deleted.

Use Case

Forcefully destroy temporary vaults in test environments. Completely destroy any environment.

Describe Ideal Solution

Add parameter force_destroy = var.backup_vault_force_destroy to block https://github.com/cloudposse/terraform-aws-backup/blob/main/main.tf#L25-L30.
Add default variable to https://github.com/cloudposse/terraform-aws-backup/blob/main/variables.tf like:

variable "backup_vault_force_destroy" {
    type = bool
    description = "Allow backup vault to be forcefully destroyed"
    default = false
}

Alternatives Considered

Manual action needed to destroy vault from AWS Console

Additional Context

No response