feat: don't use ebs auto scale for minidl

[markjschreiber]

Issue #, if available:

#278
#275

Description of Changes

• Make LaunchTemplate user data aware of workflow orchestrator (engine). Don't use ebs-autoscale when running miniwdl.
• Add code comment about the need to redeploy contexts when changing the LaunchTemplate.
• Change shutdown to echo error because shutdown won't cause batch to restart a new instance.
• Exposed initial ebs volume size to provision.sh to make it easier to change this value.
• fixed additional typo/ bug from issue 275

Description of how you validated changes

Because the changes here modify the ecs-additions scripts a full account deactivate, activate is required.

• deploy miniwdl context and run demo-wdl-project workflows. Make sure the autoexpand EBS volume is not created on batch workers
• deploy cromwell context and run demo-wdl-project workflows. Make sure the autoexpand EBS volume is still created on batch workers

Checklist

• If this change would make any existing documentation invalid, I have included those updates within this PR
• I have added unit tests that prove my fix is effective or that my feature works
• I have linted my code before raising the PR
• Title of this Pull Request follows Conventional Commits standard: https://www.conventionalcommits.org/en/v1.0.0/

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license