This refactor of Distribution.Client.ProjectBuilding does the following:

* Moves package file monitoring logic to
  Distribution.Client.ProjectBuilding.PackageFileMonitor

* Moves the `buildInplaceUnpackedPackage` and
  `buildAndInstallUnpackedPackage` with auxiliary functions to
  Distribution.Client.ProjectBuilding.UnpackedPackage

* Refactors the common bits of `buildInplaceUnpackedPackage` and
  `buildAndInstallUnpackedPackage` to remove considerable code
  duplication while simplifying and making both functions more
  structured.

Namely, to better structure build inplace vs build and install, I've
introduced:

* `PackageBuildingPhase` describes the various phases of processing the
  unpacked package both inplace and on install
    * Configure
    * Build
    * Install (copy + register)
    * Test
    * Bench
    * Repl
    * Haddock

* Then, `buildAndRegisterUnpackedPackage` implements the common logic
  between the two functions (such as calls to ./Setup and the order of
  the phases) but delegates the logic specific to each phase to an
  argument function which maps `PackageBuildingPhase` to `IO` actions.

* Now, build inplace and build and install functions are comprised as:
    * A wrapper around `buildAndRegisterUnpackedPackage` which does
      things specific to each before and after the main phases are
      processed
    * A delegate function which maps an action to each package
      processing phase

Fixes #9499