Alchemy v0.20.0
Support repo mapping for bazel runfiles. With bazel 6 + bzlmod, bazel creates a "repo mapping" file. Note that this can be a problem even if rules_rust doesn't support bzlmod, as it can occur if a bzlmod repo includes rules_rust in its WORKSPACE.bazel file. Discussion detailed at https://groups.google.com/g/bazel-discuss/c/DsVivJhU7Bw