Display examples with locales

What does this MR do?

We should display examples of the formatted time strings using locales because the output could be different. Without the examples, it was unclear exactly on what the correct format should be.

Localized dates display the day, month, and full year by default (for example: Jan 3, 2022). The date can be shortened to the day and month when space is tight (Jan 3). If the date is shortened, show the full date and time data in a tooltip, along with the timezone (Jan 3, 2022 11:00am UTC-8).

However the example above is also unclear of how to display time in seconds is it locale or ISO 8601?

Related to gitlab-org/gitlab#539203.

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