pt-BR: Merge CR v.2 pt-BR translation back into main (#1846)

This PR merges the pt-BR v.2 translation back to main.
Also, it refreshes the .po file format removing the line numbers.
This requires just a syntactical review, as the partial PRs into this
branch were reviewed already.

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

gh pr diff 1846 | bat -l patch

#317 #1463

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Co-authored-by: João Victor Mendes <[email protected]>
Co-authored-by: azevedoalice <[email protected]>

Author: 3 people