Remove printf-style logging

[Pokechu22]

I've gotten annoyed by accidentally trying to use fmt strings with INFO_LOG, so I've removed the printf-based logs (now only the _FMT variants remain). This was originally planned in #9286 for after assertions were changed to fmt, which I did in #10209. Renaming the _FMT variants to the original names could be done later on.

Note that the logging in FrameDump is receiving printf format strings and args from libav, so that still needs to handle printf strings. #10572 added a separate logging method to handle this, but I've moved the formatting to within the libav log callback. An alternative would be to keep GENERIC_LOG_V (possibly renaming it to GENERIC_LOG_VPRINTF), but it's only used here so I don't know how necessary that is.

[dolphin-emu-bot]

FifoCI detected that this change impacts graphical rendering. Here are the behavior differences detected by the system:

• zww-water on ogl-lin-mesa: failed to render

_{^{automated-fifoci-reporter}}

[lioncash]

Nice! Good riddance to the printf-based ones