[WIP][Glimmer2] Move renderNode refs in view_support

[chadhietala]

/cc @rwjblue

[rwjblue]

Seems good, but we should include at least an empty function in the glimmer component case (because Ember.TextSupport calls this.readDOMAttr() and it is a public API). It may be possible to add an implementation that reads from the element directly (as a first step). This will not "fix" the cursor position issues that plagued early Ember 1.13 work, but it should fix many other tests...

[chadhietala]

@rwjblue This doesn't fix a bunch of tests because a lot of the tests depend on sendAction at this point which we need figure out in #13532.

[rwjblue]

Gotcha