use brew install --formula (#18808)

* use `brew install --formula`

to quiet down the warnings

https://github.com/Chia-Network/chia-blockchain/actions/runs/11632671637/job/32408059295#step:13:38
```console
Warning: Treating cmake as a formula. For the cask, use homebrew/cask/cmake or specify the `--cask` flag. To silence this message, use the `--formula` flag.
Warning: cmake 3.30.5 is already installed and up-to-date.
To reinstall 3.30.5, run:
  brew reinstall cmake

Warning: gmp 6.3.0 is already installed and up-to-date.
```

* Update install-timelord.sh

install-timelord.sh

@@ -131,7 +131,7 @@ else
     symlink_vdf_bench "$PYTHON_VERSION"
   elif [ -e venv/bin/python ] && test "$MACOS"; then
     echo "Installing chiavdf dependencies for MacOS."
-    brew install boost cmake gmp
+    brew install --formula --quiet boost cmake gmp
     echo "Installing chiavdf from source."
     # User needs to provide required packages
     echo venv/bin/python -m pip install --force --no-binary chiavdf "$CHIAVDF_VERSION"