[RR] Verbose print commands when --verbose is set

[lynzrand]

• Related issues: Improve --verbose flag to display running commands and disable progress bar #1274
• PR kind: Bugfix

Summary

Closes #1274.

This PR fixes a missing feature in RR, where --verbose should let the build system print the command executed before executing.

Metadata

• Tests added/updated for bug fixes or new features
• Compatible with Windows/Linux/macOS

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
crates/moon/src/rr_build/dry_run.rs	39% smaller
crates/moon/src/cli/run.rs	33% smaller
crates/moon/src/run/runtest.rs	29% smaller
crates/moon/src/cli/build.rs	0% smaller
crates/moon/src/cli/bundle.rs	0% smaller
crates/moon/src/cli/check.rs	0% smaller
crates/moon/src/cli/doc.rs	0% smaller
crates/moon/src/cli/test.rs	0% smaller
crates/moon/src/rr_build/mod.rs	0% smaller

[Yu-zh]

Some parity tests fail because moon test -v doesn't print the executed command in legacy. I think current behavior is more desirable. Maybe we can switch to RR first and then just promote?

[lynzrand]

wait. legacy doesn't print the test commands? IIRC they do, but maybe that's on stderr... maybe all verbose stuff are all on stderr, I'll recheck.

[lynzrand]

Yes, moved them to stderr. Now it should be fine, I guess?