Fix various compilation warnings

This branch introduces the following changesets

• Moving the fusex version pragma messages to cmake configure stage
• DbMapTests - fix potential overflows using std::string & fmt
• Qclient - make folly a system include so that we skip over folly's internal gtest warnings
• FUSEX - use fmt and std::string to fix some format overflow errors with c strings

Fixes: EOS-5378

added 1 commit

• bb2b90ee - FUSEX: Stat: use fmt for formatting strings over manipulating c arrays

Compare with previous version

merged