new systemd presets not applied on upgrade

It's possible that new presets from postmarketos-base-systemd aren't applied when the system is upgraded.

For example consider the following:

1. A service's -systemd subpkg has install scripts for calling 'systemctl preset', either in pmaports or aports (later when abuild can split -systemd)

2. pmos-base-sd doesn't have any preset specified for the service, e.g. because we don't know we want it yet

3. the service is installed, probably because it was pulled in by install_if="foo systemd" in the -systemd subpkg, preset install script runs, but no presets are around so it's a no-op

4. we add the preset to pmos-base-sd later, but nothing happens on upgrade because the service -systemd install scripts for applying presets only run on post-install

A form of this happened recently in !6050 (merged), where a branch had both service preset install scripts and pmos-base-sd preset config, but apk installed them in the wrong order: first bootmac-systemd, with its .post-install script that ran systemctl preset bootmac-bluetooth, and then it installed the pmos-sd-base update w/ the preset for the bootmac-bluetooth service that was added

We need to figure out a way to apply presets when new ones are added in pmos-sd-base on upgrade.