Migrate Bazel dependency management to bzlmod

• https://bazel.build/external/overview#bzlmod
• https://docs.google.com/document/d/1JtXIVnXyFZ4bmbiBCr5gsTH4-opZAFf5DMMb-54kES0/edit#heading=h.6w973i7xcsz
• https://blog.aspect.dev/bzlmod
• https://github.com/bazelbuild/examples/tree/main/bzlmod
• https://github.com/bazelbuild/bazel-central-registry/tree/main/modules
• https://github.com/bazelbuild/rules_go/blob/master/docs/go/core/bzlmod.md