Avoid stale checked-in Cargo.lock files

[ludfjig]

Avoid stale Cargo.lock being checked in. This is annoying because rust-analyzer will rebuild them locally and update Cargo.lock, resulting in locally modified Cargo.lock files, which can interfere with git operations (like git checkout).

Most complications come from the fact that dependabot will update dependencies (like hyperlight-common dependencies) without rebuilding guests resulting in the guest's Cargo.lock being outdated after a dependabot PR

Prior art:

• Guest check added before in Fail CI if Cargo.lock is not up-to-date #126
• Tried to be fixed in Add a check for dependabot PR updating guest or common lib dependencies #154 and Update Cargo.lock for dependency updates in common crates #227 but failed
• Removed again in Dont check cargo lock for Rust test guest #240