util: Update tinyformat

Updates tinyformat.h to commit
https://github.com/c42f/tinyformat/commit/3a33bbf65442432277eee079e83d3e8fac51730c upstream.

Makes sure that our local changes are kept:

• #3767 1b8fd35aadfad6a1e55391f02add6076c8c9ea8f Make tinyformat errors raise an exception instead of assert()ing
• #4735 9b6d4c5cdc1ad7b12b8b7ba05125dad9ba2d396e Move strprintf define to tinyformat.h
• #4748 6e5fd003e04b81115b6b164b21f048472d575535 include stdexcept (for std::exception)
• #8000 9eaa0afa6ec5d3dd01e4d01121314ef51f2bc305 force USE_VARIADIC_TEMPLATES
• Add std::string format(const std::string &fmt... added this at the time, as we want to be able to do strprintf(_(...), ...)

Inspired by #8264.