chore(dev): added tap tests (#24724)

* chore(dev): added tap tests

* chore(dev): cargo fmt

* chore(dev): cargo fmt

* remove arbitrary sleep on startup, take_events should accomodate this

* simplify tap_subscription

* remove arbitrary --test-threads 4

* remove test code duplication

* separate cargo-nextest and datadog-ci inputs

* fix make-test-vector-api and cli job gates

* add a second round of tapping to verify that we can create new subscriptions and still receive events

* chore(dev): cargo fmt