build: Add golem run_build_test_targets for go/ab

Adds following golem build targets:
 * art-golem-android-armv7
 * art-golem-android-armv8
 * art-golem-linux-armv7
 * art-golem-linux-armv8
 * art-golem-linux-ia32 (this is a host build)
 * art-golem-linux-x64  (this is a host build)

Call the art/tools/golem/build-target.sh with its corresponding target name as the
machine type, and it uses art-opt-cc for golem config type.

Ensures that we don't accidentally break the golem targets.

Also refactor the target_config.py to make it more clear
what's a make, run-test, or golem command.

Bug: 35766356
Change-Id: Id1a72e5eaed8b20d1d208cf0720b1cb45d48e74d