[Glimmer2] Remove void element test

[Saranya-Raaj]

Removed htmlbar void element test and covered it in curly components test.

Part of #13127

cc @chancancode

[rwjblue]

The original test was checking for childNodes of the components element, not for childViews.

I think this (and the one below) should be:

assert.deepEqual(fooBarInstance.element.childNodes.length, 0, 'no childNodes are added for `<input>`');

[rwjblue]

Small nit-pick, but this looks great, thank you!

[Saranya-Raaj]

@rwjblue Updated, Thanks

[rwjblue]

👍 - LGTM

I'll leave to @chancancode to do final review + merge (I'm not super great at the I-N-U-R style yet 😸).

[homu]

☔ The latest upstream changes (presumably #13190) made this pull request unmergeable. Please resolve the merge conflicts.

[GavinJoyce]

a small nit-pick, assert.equal is probably clearer here

[Saranya-Raaj]

👍 Done

[chancancode]

When comparing against 0, it's always a good bet to use assert.strictEqual which uses === instead of == :)

[chancancode]

Can ✂️ the {{yield}}

[chancancode]

Looks good to me! Can be merged after resolving the minor comments above. Thank you @Matrixz!

[chancancode]

Thanks @Matrixz!