🗣 Description

Adds a variable to set tags on all ScubaConnect resources.
Tags are applied via policy and remediation tasks in Terraform.
This is done to avoid conflicts with other policies that may modify tags (each resource in terraform is configured to ignore tag changes).

💭 Motivation and context

This allows setting tags on resources which helps with organization.

🧪 Testing

• Tested deploying a new instance and confirmed tags were applied
• Tested adding a tag to an existing deployment and confirmed that tag was added to existing resources

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• PR targets the correct parent branch (e.g., main or release-name) for merge.
• Changes are limited to a single goal - eschew scope creep!
• Changes are sized such that they do not touch excessive number of files.
• All future TODOs are captured in issues, which are referenced in code comments.
• Related issues these changes resolve are linked preferably via closing keywords.
• All relevant repo and/or project documentation updated to reflect these changes.
• All automated checks (e.g., linting, static analysis, unit/smoke tests) passed.

✅ Post-merge checklist

• Feature branch deleted after merge to clean up repository.
• Verified that all checks pass on parent branch (e.g., main or release-name) after merge.