Dates in the VSCode UI and extensions are fixed to ambiguous en-US format regardless of system locale

[roblframpton]

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.79.2
• OS Version: Windows 10.0.19045

Steps to Reproduce:

As an example:

1. Go to Extensions
2. Click any extension
3. Look at the "Published" date under "More Info". It uses the US month/day/year format regardless of the system locale.

This is just one example, but there are many more severe. As noted on this ticket, which was closed as out-of-scope, the incorrect format filters down to ALL extensions. This means that, for example, the Git history extension uses the wrong format, which is far more problematic. Any event which occurred before the 13th day in a month are totally ambiguous. This is a relatively severe problem for people outside North America which devalues the funtionality and could cause genuine misunderstandings.

[gjsjohnmurray]

Extensions view is #182014 and fixed in 1.81