[Actions] Add emitter and action tests (#24199)

* wip

* Update kondo hook for with-temp*

`with-temp*` allows for unpaired bindings if you just want the default
model. This would break the `let` that the hook was binding if you had
an unpaired temp model followed by others.

* Adding tests for emitters and actions

Test hydration of :emitters

Test hydration of :action

Test http emitter execution

Test emitter crud

Test failure cases around emitter execution

Small consistency changes made to non-test code that shouldn't affect happy path FE code, largely 404 checking and keyword/string consistency.

* Fix unused requires

* Fix macro resolution