fix(launch_templates): define default for instance_metadata_tags

[chubchubsancho]

What does this PR do?

This PR fix an non idempotent plan/apply when using module launch_template

Terraform will perform the following actions:

  # module.web.module.karpenter_launch_templates.aws_launch_template.this["default"] will be updated in-place
  ~ resource "aws_launch_template" "this" {
      ~ default_version         = 9 -> (known after apply)
        id                      = "lt-xxxxxxxxxxxxx"
      ~ latest_version          = 9 -> (known after apply)
        name                    = "karpenter"
        tags                    = {}
        # (11 unchanged attributes hidden)



      ~ metadata_options {
          + instance_metadata_tags      = "disabled"
            # (2 unchanged attributes hidden)
        }


        # (5 unchanged blocks hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

• add missing variables:

  • http_protocol_ipv6
  • instance_metadata_tags

• set default value if no variable is declared on module call

Motivation

More

• Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• Yes, I have added a new example under examples to support my PR
• Yes, I have created another PR for add-ons under add-ons repo (if applicable)
• Yes, I have updated the docs for this feature
• Yes, I ran pre-commit run -a with this PR

Note: Not all the PRs required examples and docs except a new pattern or add-on added.

For Moderators

• E2E Test successfully complete before merge?

Additional Notes

[bryantbiggs]

usually we like to use null for optional but since these match the API defaults I think this is ok - thanks for the PR!

[askulkarni2]

LGTM!