Replace SCIM with the Wheezy equivalent

At least scim-anthy, scim-pinyin, scim-uim and scim-hangul must be replaced by the Wheezy equivalent, that is likely uim-anthy or ibus-anthy and friends.

Parent Task: #6015 (closed)

Related issues

Related to #5624 (closed)

Original created by @tails on 5487 (Redmine)

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