Support alternative loggers

[pboling]

• e.g. https://github.com/pboling/activesupport-tagged_logging

Since Rails uses autoloading, there is no need to explicitly require active_support/tagged_logging, and doing so actively prevents using an alternative.

I have created a suite of gems that replace the Rails logger. They extract the logging tooling from Rails 8, add in some refactoring and fixes that allow broadcasting, tagged logging, and blocks, to all work together, (which bugs have always been present in tagged logging, and remain in v8.0, see Rails PR 53093 and Rails PR 53105).

It works with Rails because of the autoloading. If a namespace / constant is already defined, it won't go looking for it. So by defining it in my extracted gems, the vanilla (broken) Rails version doesn't load.

At that point the only problem comes from libraries which load certain Rails internals explicitly.

The suite of gems I'm aiming to have compatibility with is:

• Enhanced activesupport-logger which was ripped from Rails v8.0
• Enhanced activesupport-broadcast_logger which was ripped from Rails v8.0, and this PR
• Enhanced activesupport-tagged_logging which was ripped from Rails v8.0, and this PR