Consider Renaming get_equipment Method for Clarity

[jknndy]

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Related to discussion in #1279 .
The get_equipment method could benefit from a more descriptive name. Currently the method de-duplicates and preserves the order of the list which isn't exactly equipment related.

Some potential new names:

• deduplicate_ordered_list
• deduplicate_preserve_order (I'm partial to this one if the functionality remains the same)
• serialize_list_to_tags

I could find 3 instances where the functionality maintaining the order is required (argiro, beyondfrosting & glutenonashoestring). This could easily be implemented directly into each individual scraper or functionality could remain on the 29 current scrapers that contain the function as a "safety" feature for instances where untested pages contain duplicate items in their list.