Remove extra test targets from inside build script

Due to branch constraints, remove the extra targets defined inside the
build script and revert to having them be passed in via command line.

Test: ./build/make/ci/build_test_suites_x86_64-trunk_staging --target_product aosp_x86_64 --target_release trunk_staging --with_dexpreopt_boot_img_and_system_server_only <extra_targets>
Bug: 314171817
Change-Id: I89a82e969d294104f587d778ad319a41905320f8