refactor(rust): merge functions for enriching tags

[Wryhder]

Current behavior

Proposed changes

This PR follows up on PR #8707 where I'd asked about combining the functions for enriching the preview and unsafe tags, since they're similar.

I left the enrich_preview_tag() and enrich_unsafe_tag() functions, and just modified their definitions, to avoid breaking code that already references them. But please let me know if I should modify any such code to use enrich_tag() directly.

@adrianbenavides Could you please take a look when you get the chance?

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[adrianbenavides]

Hey @Wryhder thanks for creating the PR 🙏

I'll review it as soon as I can!

[adrianbenavides]

Looks good, thanks again @Wryhder! 🚀