Rust

Move build_rust_cmd function to build_defs.bzl for Bazel 7.x compatib… #4

Job	Run time
Rust Lint	1m 5s
Rust FFI C++ Tests (macos-latest)	7m 37s
Rust Tests (windows-latest)	1m 13s
Rust FFI C++ Tests (windows-latest)	7m 31s
Rust FFI C++ Tests (ubuntu-latest)	7m 54s
Rust Tests (ubuntu-latest)	1m 8s
Rust Tests (macos-latest)	11s
	26m 39s

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