Allow default_tags to be set by environment variables

[jtdoepke]

Description

This commit has the provider consume default_tags from environment variables with the form TF_AWS_DEFAULT_TAGS_<tag_name>=<tag_value>. If the same tag is defined in both an environment variable and the Terraform config, the Terraform takes precedence.

Relations

Closes #33255

References

Output from Acceptance Testing

% make testacc TESTS=TestAccProvider_DefaultTagsTags_env_vars PKG_NAME=internal/provider

==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/provider/... -v -count 1 -parallel 20 -run='TestAccProvider_DefaultTagsTags_env_vars'  -timeout 180m
?       github.com/hashicorp/terraform-provider-aws/internal/provider/fwprovider        [no test files]
=== RUN   TestAccProvider_DefaultTagsTags_env_vars
--- PASS: TestAccProvider_DefaultTagsTags_env_vars (20.22s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/provider   20.660s

[github-actions]

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[github-actions]

Welcome @jtdoepke 👋

It looks like this is your first Pull Request submission to the Terraform AWS Provider! If you haven’t already done so please make sure you have checked out our CONTRIBUTOR guide and FAQ to make sure your contribution is adhering to best practice and has all the necessary elements in place for a successful approval.

Also take a look at our FAQ which details how we prioritize Pull Requests for inclusion.

Thanks again, and welcome to the community! 😃

[bcbrockway]

Just wondering what's left to get this over the line? We could really use this functionality.

[jar-b]

LGTM 🚀

[jar-b]

Thanks for your contribution, @jtdoepke! 👍

[github-actions]

This functionality has been released in v5.62.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.