TinyMCE: A Strategy to Get the Classic Block Not Loaded Automatically

TinyMCE has been in WordPress for almost 20 years, but it's also contained in classic blocks. This change sets the path for the TinyMCE deprecation to update the experiments with a strategy to get the TinyM CE and the classic block not loaded automatically,. But only when it needs to load. That definitely has a performance improvement. It could be another year or two, or maybe only half a year depending on how the experiments go. The end goal is pretty much the end goal to have TinyMCE not load automatically, but load only when it really needs to be loaded.