build: Clean up makefile hook inclusions

* Include MTK/QCOM rules directly from
  vendor/lineage/build/core/config.mk hook, since that is what it is
  there for.
* Remove apicheck.mk hook, this is unused, and if it turns out to be
  needed again, it can be included by the config.mk hook mentioned above.
* Place main.mk hook into vendor/lineage/build/core/main.mk with the
  rest of the make build system hooks.

Change-Id: I51bda9f5d35a63113d6eab98e06da8919ba46480