non-UTF8 paths on Linux are not always escaped

Bug report

What operating system and version are you using?

Linux

What version of osquery are you using?

master

What steps did you take to reproduce the issue?

1. From a shell create a file with a non-UTF8 character with touch $'file with \x80 non-utf8 name'. Also suppose that this file is in /home/user
2. With ls verify that the filename should look like 'file_with_'$'\200''_non-utf8_name'
3. Run this osqueryi query: osqueryi -S 'SELECT * FROM file WHERE path LIKE "/home/user/%"'
4. Also try with osqueryi -S --json 'SELECT * FROM file WHERE path LIKE "/home/user/%"'

What did you expect to see?

The filename escaped in some way, so that it's still in UTF8

What did you see instead?

The problem is that we never escape the results, unless they are in a scheduled query with a differential query, so the same problem exists for results that are either saved locally to log files or sent via network.
More info also in https://github.com/osquery/osquery/issues/7614.

Reproduce the issue with osqueryi, the file table, and both normal and --json queries using the non-UTF8 filename described. Trace how file-table results are serialized and handled for direct output, saved logs, and network results, also reviewing issue 7614. Done means the path is escaped into valid UTF-8 consistently across these outputs.