Migrate logging to std::format

[neo1973]

Description

Simple conversion of logging to use std::format.

Motivation and context

Primarily to have proper support to print std::string_view (see #1750). And also in general the syntax is nicer and compile time format string checks can catch certain errors.

How has this been tested?

Compiled and tested on x86_64 Linux. YouTube live streams and regular videos work.

Screenshots (if appropriate):

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Clean up (non-breaking change which removes non-working, unmaintained functionality)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that will cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• None of the above (please explain below)

Checklist:

• I have read the Contributing document
• My code follows the Code Guidelines of this project
• My change requires a change to the Wiki documentation
• I have updated the documentation accordingly

[neo1973]

Old toolchains are a PITA... I'll try to pull in fmtlib until all platforms catch up and support std::format.