[Task]: Read promoted group properties for multiple promoted groups

[KevinMind]

Description

To support multiple PromotedGroup per PromtedAddonPromotion in order to query the details of the aggregate promoted groups we need an interface that will return the correct data depending on both the property being queried and the set of PromotedGroups associated with the addon.

Example interface could look like

addon = Addon.objects.get(pk=1)
# Get the promoted addon search bump should return the highest value for all Promoted groups
addon.promotedaddon.properties(currently_approved=True).search_ranking_bump
# Effectively the same as this
max(PromotedGroup.objects.filter(addon=addon).values_list('search_ranking_bump'))
# Though it's a bit more complicated with `currently_approved` which would have to get PromotedGroup via PromotedAddonVersion
max(PromotedAddonVersion.objects.filter(version=addon.current_version).values_list('promoted_group__search_ranking_bump'))

Acceptance Criteria

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Checks

• If I have identified that the work is specific to a repository, I have removed "repository:addons-server" or "repository:addons-frontend"

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