Fix Duration shape to support RTL languages

[sebastienros]

In DateTimeShapes

We can't concatenate localized strings because RTL and other languages might not accept this order. Localized strings should be a single string with arguments. However with durations we need multiple variables to define the plurals, which we can't do (too many combinations), so we need to choose a form that will work in all cases.

Suggestions, with the example of 2 days and 3 minutes.

1. 2 different strings
   When it's not a single unit: "approximately 2 days" and for single units: "2 days"
2. Only use the biggest unit: "2 days"

We will ignore the smaller parts of the duration.

[github-actions]

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[sebastienros]

@MikeAlhayek note that the actual HTML should display the simple translated text, and have a tooltip with the actual duration in an official dotnet format. Check the GH commits history that shows when a commit was merged.