This closes #8408. Thanks to @gmichalec-pandora for letting us know about this.
This is the result of running the no-implicit-this-codemod, some manual fixes, and the addition of a linting rule to prevent future ambiguity.
This includes fixes for newer template lint rules that came along with updating that dependency, which was necessary to be able to use the no-curly-component-invocation rule. It also updates some curly invocations that I missed in #8075.
