* Update script/chromium-rebase-l10n.py to migrate google_chrome strings
* Move browser names to constatns
* Updates pulling brave_strings.grd l10n.
-Removes google_chrome_strings additions to brave_strings on the fly to
pull l10n correctly.
-Readds google_chrome_strings additional translations to XTBs.
(cherry picked from commit efebe82760d0d4a5b02bab3ad207aab6d8a20300)
* Change xtb writing function
* Migrate translation to xtb and grd files
* Fixes executable bit on python script.
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Co-authored-by: mkarolin <max@brave.com>