[release/8.0] Use JS interop to get full NativeName, DisplayName

[ilonatommy]

Backport of ##99956 to release/8.0
Fixes #110035, #44739, #45951 in net8.

Customer Impact

Customers that use net8 don't have full form of DisplayName, EnglishName, they see e.g.: de (DE) instead of German (Germany). With this change they will be able to see the longer form.

• Customer reported
• Found internally

Regression

We intentionally shortened DisplayName, EnglishName to shrink ICU size and we kept it that way for some time. When we realized that JS API can give WASM app the missing globalization information, we leveraged it to revert the full form of DisplayName, EnglishName.

• Yes
• No

Testing

CI testing edited in this PR will be asserting this change.

Risk

Medium, this change involves unsafe code, icalls to JS. On the other hand, the backport is 1:1 and the change to net 9 was added relatively early in the release cycle.

I am leaving it as a draft until @lewing approves.

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