remove provisioner checks (#4254)

* chore/provisioner: move metrics to a separate module

* avoid the duplicate names

* reduce all checks

* fixup tests

* Update node/core/provisioner/src/lib.rs

Co-authored-by: Zeke Mostov <[email protected]>

* chore: fmt

* chore: spellcheck

* doc

* remove the enum anti-pattern

* guide update - remove all the responsibilities

* add another trivial check

* Update node/core/provisioner/src/metrics.rs

Co-authored-by: Andronik Ordian <[email protected]>

* Update roadmap/implementers-guide/src/node/utility/provisioner.md

Co-authored-by: Andronik Ordian <[email protected]>

* Update node/core/provisioner/src/metrics.rs

Co-authored-by: Andronik Ordian <[email protected]>

Co-authored-by: Zeke Mostov <[email protected]>
Co-authored-by: Andronik Ordian <[email protected]>