feat: lake: `.nobuild` trace file for debugging (#12076)

This PR adds additional debugging information to a run of `lake build
--no-build` via a `.nobuild` trace file. When a build fails due to
needing a rebuild, Lake emits the new expected trace next as `.nobuild`
file next to the build's old `.trace`. The inputs recorded in these
files can then be compared to debug what caused the mismatch.

To help keep the build directory clean, the `.nobuild` trace file is
removed on the next successful build.