ko: Merge CR v.2 Korean translation back into main (#1918)

This PR merges the Korean (ko) v.2 translation back to main.
This requires just a syntactical review, as the partial PRs into this
branch were reviewed already.

**The Chromium translation is still pending but I realized it's better
to get this out and start benefiting users in the other modules.**

You can skim this PR with the [GitHub CLI](https://cli.github.com/):

gh pr diff 1918 | bat -l patch

#1463 #284

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Andriy Redko <drreta@gmail.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Martin Geisler <mgeisler@google.com>