Merge bitcoin-core/secp256k1#1578: ci: Silent Homebrew's noisy reinstall warnings

7057d3c9af ci: Silent Homebrew's noisy reinstall warnings (Hennadii Stepanov)

Pull request description:

  Homebrew's warnings are quite noisy on the master branch:
  ![image](https://github.com/user-attachments/assets/82b95369-b8c9-4b99-b72c-41d0b084d4b8)

  This PR silents them to allow us to focus on any other CI infra warnings once they happen.

ACKs for top commit:
  real-or-random:
    utACK 7057d3c9af

Tree-SHA512: 4dbdb459e97cb5956219214fd7407ec52fc018dba24ae945337ad5c94df510472cfc708f9f67d4df5b8e983bf4e78b2efd56533f28113b3463a1397d4d7a032a

.github/workflows/ci.yml

@@ -632,7 +632,7 @@ jobs:
 
       - name: Install Homebrew packages
         run: |
-          brew install automake libtool gcc
+          brew install --quiet automake libtool gcc
           ln -s $(brew --prefix gcc)/bin/gcc-?? /usr/local/bin/gcc
 
       - name: Install and cache Valgrind
@@ -691,7 +691,7 @@ jobs:
 
       - name: Install Homebrew packages
         run: |
-          brew install automake libtool gcc
+          brew install --quiet automake libtool gcc
           ln -s $(brew --prefix gcc)/bin/gcc-?? /usr/local/bin/gcc
 
       - name: CI script