Describe the bug

Rust 1.50.0 incorporated a Cargo change (rust-lang/cargo#8937) in which cargo vendor erroneously changed permissions of vendored crates. This was fixed in Rust 1.51.0 (rust-lang/cargo#9131). Unfortunately, this means that all cargoSha256/cargoHashes produced during the Rust 1.50.0 cycle are potentially broken.

The long-term solution for this issue is that we should probably apply our own normalization for permissions (#121259). But first, we should check/update cargoSha256/cargoHash tree-wide.