Account for collation when coercing the output of a SQL function.
Commit
913bbd88d overlooked that the result of coerce_to_target_type
might need collation fixups. Per report from Andreas Joseph Krogh.
Discussion: https://postgr.es/m/VisenaEmail.72.
37d08ec2b8cb8fb5.
17179940cd3@tc7-visena