## What changed
Extract the inline test modules for `bundled_bwrap`, `bwrap`, `exec_util`,
`launcher`, `proxy_routing`, and `seccomp` into sibling `*_tests.rs` files.
Keep them wired through `#[cfg(test)]` and explicit `#[path]` attributes,
with existing test coverage and runtime behavior unchanged.
GitOrigin-RevId: 79b70a092a19b10716939744542415bc1dcaf0b2