ilike, ~*, ~~* does not work on 8.0.3 (db encoding - UNICODE)

[Sergey Levchenko <sector119@xxxxxxxxx>]

I can not get work ilike, ~*, ~~* with not ascii chars, but upper,lower, order by - work good.db encoding is UNICODE.
test=> SELECT 'Тест' ~~* 'тест'; ?column? ---------- f
test=> SELECT 'Тест'' ~* 'тест'; ?column? ---------- f
test=> SELECT 'Тест'' ILIKE 'тест'; ?column? ---------- f
test=> SELECT upper('Тест'') ~~ upper('тест'); ?column? ---------- t

tesscom=> SELECT upper('Тест'') ~ upper('тест'); ?column? ---------- t
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