fix(jqLite): fix regression where mutating the dom tree on a event breaks jqLite.remove

[rodyhaddad]

012ab1f introduced a regression where if a user's $destroy event modified the descendant DOM tree, jqLite.remove would break.
This is because it uses getElementsByTagName and caches the length of the returned live NodeList

cc @ggoodman

[mary-poppins]

Thanks for the PR! Please check the items below to help us merge this faster. See the contributing docs for more information.

• Uses the issue template (#8359)

If you need to make changes to your pull request, you can update the commit with git commit --amend.
Then, update the pull request with git push -f.

Thanks again for your help!

[jeffbcross]

LGTM, merge