Remove most mentions of the "component model"

[rylev]

For almost all of usages of the term "component model", we would likely be better off just saying "WebAssembly components". Usage of the term "component model" naturally leads to the question of what is the "model" in "component model" which it self requires explaining what components are. By moving to "WebAssembly components" we cut straight to the relevant question, the reader is likely to be asking, namely: what are WebAssembly components?

[kate-goldenring]

Great point. +1