eval: feed stdin from an empty temporary file to avoid hangs

[dschrempf]

This is a followup of #4726.

Feed stdin from an empty file.

The test explains the behavior:

-- 1. Support `stdin`
module TIO where

{- Feed `stdin` with empty data.

Avoid server hangs indefinitely, waiting for `stdin` to terminate.

Shows a clear error message.

>>> getLine >>= print
<stdin>: hGetLine: end of file
-}

@xsebek

Fixes #2913.

[dschrempf]

Somehow

cabal run func-test -- -p '/eval plugin sends progress reports/'

times out.

Any ideas?