make clean fails if rust isn't installed

[f8-ptrk]

Checklist

• [X] This is not a security-related bug/issue. If it is, please follow please follow the security policy.
• [X] I have searched on the issue tracker and the lotus forum, and there is no existing related issue or discussion.
• [X] I am running the Latest release, the most recent RC(release canadiate) for the upcoming release or the dev branch(master), or have an issue updating to any of these.
• [X] I did not make any code changes to lotus.

Lotus component

• [ ] lotus daemon - chain sync
• [ ] lotus fvm/fevm - Lotus FVM and FEVM interactions
• [ ] lotus miner/worker - sealing
• [ ] lotus miner - proving(WindowPoSt/WinningPoSt)
• [ ] lotus JSON-RPC API
• [ ] lotus message management (mpool)
• [X] Other

Lotus Version

following certain routs of the readme.md file lets you skip installing rust

make clean then errors

Repro Steps

1. Run '...'
2. Do '...'
3. See error '...' ...

Describe the Bug

x

Logging Information

x

[f8-ptrk]

make clean
rm -rf build/.filecoin-install build/.update-modules lotus lotus-miner curio sptool lotus-worker lotus-shed lotus-gateway lotus-seed lotus-fountain lotus-bench lotus-stats lotus-pcr lotus-health lotus-wallet lotus-keygen testground tvx lotus-sim
make -C extern/filecoin-ffi/ clean
make[1]: Entering directory '/opt/filecoin/build/lotus/extern/filecoin-ffi'
go clean -cache -testcache
rm -rf filcrypto.h filcrypto.pc libfilcrypto.a .install-filcrypto
rm -f ./runner
cd rust && cargo clean && cd ..
/bin/sh: 1: cargo: not found
make[1]: *** [Makefile:21: clean] Error 127
make[1]: Leaving directory '/opt/filecoin/build/lotus/extern/filecoin-ffi'
make: [Makefile:328: clean] Error 2 (ignored)