Convert tfoot/row/cell to glimmer

[sly7-7]

related to #344
cc/ @bgantzler (or @cah-briangantzler ?)

I will rebase when #352 is merged.
I basically did the same work as in #351

[cah-brian-gantzler]

When you are able, if you rebase this branch, the failing tests will no longer fail. You will also notice a couple empty constructors now, you can remove them. You may then get a lint warning that the entire class is no longer needed. you can add

// eslint-disable-next-line ember/no-empty-glimmer-component-classes

above the class to disable that lint

[sly7-7]

Hi @cah-briangantzler , @miguelcobain, I can't unfortunately update this pr before Sunday evening, when I come back home. Obviously I will be glad to do it, but if you want to put this forward, this is not a pb for me. Do as you want 🙂

[cah-brian-gantzler]

Im in no hurry, got other things to do, take your time

[miguelcobain]

@sly7-7 we can remove the deprecation since we are major bumping.

[miguelcobain]

@cah-briangantzler please give this a quick review as well. But everything looks fine to me.

[cah-brian-gantzler]

Looks like it pretty much mirrors the body/row/cell as it should. Looks good to me