fix file info delete query

[M-Evans]

Summary

title.

Ticket Link

introduced in #4746, fixes #4947

Additional Information

I've not touched the bad query in mm auth layer because the schema is too different from the correct schema for the file_info table.

CREATE TABLE file_info (
    id varchar(26) NOT NULL,
    create_at BIGINT NOT NULL,
    delete_at BIGINT,
    name TEXT NOT NULL,
    extension VARCHAR(50) NOT NULL,
    size BIGINT NOT NULL,
    archived BOOLEAN
, path varchar(512));

[mattermost-build]

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