fetch answers: avoid utils module

fetch answers: avoid utils module

utils/helpers/tools are all modules with a way to generic name and
will be misused as dumping ground for basically everything.

Just move the helper to where they are used and drop some bogus
methods like get_answer_file, which neither searches nor gets an
answer file (type) but just is a plain and slightly over engineered
std::fs::read_to_string

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>