Support domain name override

[Balsir]

Describe the Feature

Support override of Elasticsearch/Opensearch domain name.

resource "aws_elasticsearch_domain" "default" {
  count                 = local.elasticsearch_enabled ? 1 : 0
  domain_name           = module.this.id # <===== make this overridable
  elasticsearch_version = var.elasticsearch_version

Expected Behavior

Elasticsearch/Opensearch domain name overridable via variable. Label module used for tags and other resources.

Use Case

The domain name has a limit of 3-28 characters, which can be too easily breached when using all the fields of the label module. It is still, however, desirable to use the standard label scheme for other resources (e. g. IAM roles) or tags.

Describe Ideal Solution

Optional variable which overrides the domain name in all appropriate places.

Alternatives Considered

Override module.label, which potentially breaks the user's standard naming scheme.

Additional Context

No response