FirstRun: install Alpine deps to a virtual meta package

This allows easy uninstalling of deps later on with "apk del
makedeps-kdesrc-build"
2 jobs for alpine-virtual-package in 2 minutes and 31 seconds (queued for 42 minutes and 19 seconds)
Status Job ID Name Coverage
  Test
passed #92324
smoke-test

00:01:58

passed #92323
unit-test

00:00:33