Revamped gjs/gts support

[NullVoxPopuli]

requires content-tag updates

Lints need to know what's in scope:

• [gjs]: no-unknown-arguments-for-builtin-components incorrectly assumes an <Input> is the ember <Input> #3014
• [gjs]: require-input-label incorrectly assumes an <Input> is the ember <Input> #3015

[bmish]

I assume you'll want to get this into v6?

• Plan v6 Release #2712

[NullVoxPopuli]

aye -- will be important as gjs/gts are now in the guides https://guides.emberjs.com/release/components/template-tag-format/