* Relocate MunkiStatus.app and Munki-notifier.app to ../Contents/Helpers/ from ../Contents/Resources/
- Updated location of munki-notifier in code/apps/Managed Software Center/Managed Software Center/Controllers/MainWindowController.swift
- Added code/client/installhelper script
- Amended code/tools/make_munki_mpkg.sh with new locations for munki-notifier and MunkiStatus as well as changes required to leverage `installhelper`
- Amended code/tools/pkgresources/Scripts_app_usage/postinstall to leverage `installhelper`
- Deleted code/tools/pkgresources/Scripts_app_usage/preinstall as the actions within should be handled now by `installhelper`
- Amended code/tools/pkgresources/Scripts_launchd/postinstall to leverage `installhelper`
- Amended launchd/LaunchAgents/com.googlecode.munki.munki-notifier.plist to use the new path to munki-notifier.app
- Amended launchd/LaunchAgents/com.googlecode.munki.MunkiStatus.plist to use the new path to MunkiStatus.app
This is a resubmission of https://github.com/munki/munki/pull/1203, which needed it's base branch changing from `main` to `Munki6dev`
* Update installhelper
- Removed CHECK_TIME global - 374fbaf922 (r1515000516)
- Remove erroneous login window comments - 374fbaf922 (r1515006835) and 374fbaf922 (r1515006962)
- Simplified IF condition - 374fbaf922 (r1515005565) this was in place incase LimitLoadToSessionType contained multiple values (as it can).
* Update installhelper
- Reverted changes made for - 374fbaf922 (r1515005565)
- Changed constant/global PASSED_ARG to local: launchd_group - https://github.com/munki/munki/pull/1207#discussion_r1515002646 and https://github.com/munki/munki/pull/1207#discussion_r1515002968
* Update installhelper
* Update installhelper
* Update installhelper
* Update installhelper
* Update make_munki_mpkg.sh
Amended so that the launchd pkg is installed by default
