Revert "back out the build_runner.zig moving change"

This reverts commit 1a01151a4e1e83826d6911c929210aabcaed36e9 in
preparation for a zig1.wasm update.
e646e01161Jacob Young committed on 3/17/2024, 2:06:39 AMparentd10c52c
3 files changedLine totals unavailable