make CI consistent with build system changes

.github/workflows/test_challenge.yml

@@ -11,12 +11,11 @@ jobs:
       uses: actions/checkout@v3
       with:
         submodules: true
-    - name: Install Toolchain (Go, Node.js, Yarn and Make)
+    - name: Install Toolchain (Go, Node.js and Make)
       run: |
         sudo apt-get update
         sudo apt-get -y --no-install-recommends install golang-1.16 nodejs npm make
-        npm install --global yarn
     - name: Build
-      run: make unicorn minigeth_mips minigeth_default_arch mipsevm yarn
+      run: make libunicorn minigeth_mips minigeth_prefetch mipsevm nodejs
     - name: Run test challenge
       run: make test_challenge

.github/workflows/test_challenge_fault.yml

@@ -11,11 +11,10 @@ jobs:
       uses: actions/checkout@v3
       with:
         submodules: true
-    - name: Install Toolchain (Go, Node.js, Yarn and Make)
+    - name: Install Toolchain (Go, Node.js and Make)
       run: |
         sudo apt-get update
         sudo apt-get -y --no-install-recommends install golang-1.16 nodejs npm make
-        npm install --global yarn
     - name: Build
       run: make build
     - name: Run fault injection challenge scenario

.github/workflows/test_challenge_simple.yml

@@ -11,11 +11,10 @@ jobs:
       uses: actions/checkout@v3
       with:
         submodules: true
-    - name: Install Toolchain (Go, Node.js, Yarn and Make)
+    - name: Install Toolchain (Go, Node.js and Make)
       run: |
         sudo apt-get update
         sudo apt-get -y --no-install-recommends install golang-1.16 nodejs npm make
-        npm install --global yarn
     - name: Build
       run: make build
     - name: Run simple challenge scenario

.github/workflows/test_minigeth.yml

@@ -16,6 +16,6 @@ jobs:
         sudo apt-get update
         sudo apt-get -y --no-install-recommends install golang-1.16 make
     - name: Build minigeth
-      run: make minigeth_default_arch
+      run: make minigeth_prefetch
     - name: Test Minigeth
       run: make test_minigeth

.github/workflows/test_mipsevm.yml

@@ -11,11 +11,10 @@ jobs:
       uses: actions/checkout@v3
       with:
         submodules: true
-    - name: Install Toolchain (Go, Node, Yarn & Make)
+    - name: Install Toolchain (Go, Node.js and Make)
       run: |
         sudo apt-get update
         sudo apt-get -y --no-install-recommends install golang-1.16 nodejs npm make
-        npm install --global yarn
     - name: Build
       run: make build
     - name: Test MIPS EVM