install cargo-llvm-cov on MG CI jobs where it is needed

.github/workflows/mg.yaml

@@ -14,6 +14,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Install cargo-llvm-cov
+        run: cargo install cargo-llvm-cov
       - name: Run bad-pool-config-test
         run: sh ./test/message-generator/test/bad-pool-config-test/bad-pool-config-test.sh
 
@@ -86,6 +88,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Install cargo-llvm-cov
+        run: cargo install cargo-llvm-cov
       - name: Run pool-sri-test-extended_0
         run: sh ./test/message-generator/test/pool-sri-test-extended_0/pool-sri-test-extended_0.sh
 
@@ -94,6 +98,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Install cargo-llvm-cov
+        run: cargo install cargo-llvm-cov
       - name: Run pool-sri-test-extended_1
         run: sh ./test/message-generator/test/pool-sri-test-extended_1/pool-sri-test-extended_1.sh
 
@@ -102,6 +108,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Install cargo-llvm-cov
+        run: cargo install cargo-llvm-cov
       - name: Run pool-sri-test-reject-auth
         run: sh ./test/message-generator/test/pool-sri-test-reject-auth/pool-sri-test-reject-auth.sh
 
@@ -110,6 +118,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Install cargo-llvm-cov
+        run: cargo install cargo-llvm-cov
       - name: Run standard-coverage
         run: sh ./test/message-generator/test/standard-coverage-test/standard-coverage-test.sh
 
@@ -134,6 +144,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Install cargo-llvm-cov
+        run: cargo install cargo-llvm-cov
       - name: Run translation-proxy
         run: sh ./test/message-generator/test/translation-proxy/translation-proxy.sh