fix(outputs): refactor unroll_tags to use str as tags

[pedrooot]

Context

The tags can also be unique strings; until now, they were expected to have the key: value format.

Fix #4740 Fix #4799

Description

unroll_tags method has been modified to manage str as tags for resources:

>>> tags = ["name", "age"]
>>> unroll_tags(tags)
{'tag0': 'name', 'tag1': 'age'}

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• [x] Review if the code is being covered by tests.
• [x] Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings

License

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

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.06%. Comparing base (a557d62) to head (476a181).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #4817 +/- ## ======================================= Coverage 89.05% 89.06% ======================================= Files 926 926 Lines 28363 28365 +2 ======================================= + Hits 25258 25262 +4 + Misses 3105 3103 -2 ```

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[sergargar]

Using this approach for cases of tags without values like:

{
    "tags": {
        "Author": ""
    }
}

[github-actions[bot]]

💚 All backports created successfully

Status	Branch	Result
✅	v4.3

Questions ?

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