refactor: cleanup zero'd out processes when a Procfile omitting those process types is set

This change also moves the referenced Procfile out to a host path once on deploy vs potentially several times, which should speed up deploys a small amount and simplify reasoning about the file.

Closes #5112

docs/development/plugin-triggers.md

@@ -1783,21 +1783,6 @@ APP="$1";
 curl "https://dokku.me/starting/${APP}" || true
 ```
 
-### `procfile-extract`
-
-- Description: Extracts a Procfile from a given image to a path
-- Invoked by: `internally`
-- Arguments: `$APP $IMAGE`
-- Example:
-
-```shell
-#!/usr/bin/env bash
-
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
-
-# TODO
-```
-
 ### `procfile-get-command`
 
 - Description: Fetches the command for a specific process type
@@ -1813,21 +1798,6 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 # TODO
 ```
 
-### `procfile-remove`
-
-- Description: Removes the extracted Procfile
-- Invoked by: `internally`
-- Arguments: `$APP`
-- Example:
-
-```shell
-#!/usr/bin/env bash
-
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
-
-# TODO
-```
-
 ### `proxy-build-config`
 
 - Description: Builds the proxy implementation configuration for a given app