InputCommon: Migrate logging over to fmt

[lioncash]

Continues the migration of the logging calls over to the fmt capable ones.

[iwubcode]

I haven't kept up with this. Just curious but why not just change the base log function and then search/replace the ones that broke or are non-conforming? Not super easy I guess?

Do you plan on removing the non FMT version after all the upgrades are finished?

[lioncash]

Because that would be a huge PR that touches everything all at once, which sucks to review. Having both logging paths exist at once and migrating them over to the new one allows individual PRs to be kept compact and easily reviewed quickly and more thoroughly. I'd rather people not get mentally checked out halfway through a hypothetical 1000+ line PR that almost entirely consists of text formatting.

Yes the _FMT version will eventually have the suffix dropped once everything is moved over and the old one will be removed. There's no reason to keep two logging systems in place.

[BhaaLseN]

Just two tiny nits, up to you if you want to address them or not. LGTM.

[lioncash]

@BhaaLseN resolved them both