Refactor translations to reduce dict lookups

[bdraco]

Proposed change

TLDR: the O(n) lookup (set of components) is now at the tail of the cache instead of having to transverse it in the middle of the cache. This allows the cache fetch to avoid looking up the category each loop.

This started to matter a bit more now that we translate a lot more things.

All of our cache lookups used:

cache[language][O(component)][category]

The cache was designed as

cache[language][component][category][flatted_key]

The lookups are now

cache[language][category][O(component)]

The cache is now stored as

cache[language][category][component][flatted_key]

This provides better alignment with how the fetch function asks for the data

        language: str,
        category: str,
        components: set[str],

Type of change

• Dependency upgrade
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• This PR fixes or closes issue: fixes #
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