crate_universe + bzlmod breaks with pre-release version of bazel

[konkers]

Bazel has changed its repository name separator character from ~ to + so rules_rust~~rust_host_tools~rust_host_tools become rules_rust++rust_host_tools+rust_host_tools. These +s conflict with the logic in https://github.com/bazelbuild/rules_rust/blob/main/crate_universe/src/utils.rs#L30 which assumes they come from cargo vendor.

Steps to reproduce:

• Check out rules rust at e97988273b809b6fb5e435478469cd19ab76526c
• change examples/bzlmod/.bazelversion to d62e0a0f32188e1875bb8e62ef4377ea4dc1aab2
• cd to examples/bzlmod/all_crate_deps
• run bazelisk test //...

The build will fail with:

ERROR: Traceback (most recent call last):
        File "/private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/external/rules_rust+/crate_universe/extension.bzl", line 369, column 37, in _crate_impl
                _generate_hub_and_spokes(module_ctx, cargo_bazel, cfg, annotations, cargo_lockfile = cargo_lockfile, manifests = manifests)
        File "/private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/external/rules_rust+/crate_universe/extension.bzl", line 139, column 16, in _generate_hub_and_spokes
                cargo_bazel([
        File "/private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/external/rules_rust+/crate_universe/private/module_extensions/cargo_bazel_bootstrap.bzl", line 66, column 17, in run
                fail("%s returned with exit code %d:\n%s" % (pretty_args, result.return_code, result.stderr))
Error in fail: /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/external/rules_rust++cargo_bazel_bootstrap+cargo_bazel_bootstrap/cargo-bazel generate --cargo-lockfile /Users/konkers/work/rules_rust/examples/bzlmod/all_crate_deps/Cargo.lock --config /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/modextwd/rules_rust++crate/crates/config.json --splicing-manifest /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/modextwd/rules_rust++crate/crates/splicing_manifest.json --repository-dir /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/modextwd/rules_rust++crate/crates --metadata /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/modextwd/rules_rust++crate/crates/splicing-output/metadata.json --repin --lockfile /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/modextwd/rules_rust++crate/crates/lockfile.json --cargo /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/external/rules_rust++rust_host_tools+rust_host_tools/bin/cargo --rustc /private/var/tmp/_bazel_konkers/a8dfe56ae7c980ef250452d78696ce61/external/rules_rust++rust_host_tools+rust_host_tools/bin/rustc returned with exit code 101:
thread 'main' panicked at src/utils.rs:49:22:
Could not rename paths: Os { code: 2, kind: NotFound, message: "No such file or directory" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
ERROR: error evaluating module extension crate in @@rules_rust+//crate_universe:extension.bzl

[criemen]

This is essentially a duplicate of #2801, except that bazel HEAD has that incompatible flag flipped by default.

[konkers]

I'm going to close this one and consolidate discussion on #2801

[criemen]

Fixed by #2908, but I lack the permissions to close this issue.