Convert all field from utf8 to utf8mb4

We need to do it to support native emoji, now when native emoji is entered part of content is lost(after emoji symbol) and may cause some PHP errors

For Db:

ALTER DATABASE db_name_here CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;

For each table:

ALTER TABLE table_name_here CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

For each field (change type accordingly):

ALTER TABLE table_name_here CHANGE field_name_here field_name_here field_type_here(X) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

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