ci: remove prepare job and consolidate changelog validation into a single job

Author: hmalik88

.github/workflows/build-lint-test.yml

@@ -4,30 +4,9 @@ on:
   workflow_call:
 
 jobs:
-  prepare:
-    name: Prepare
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [18.x, 20.x, 22.x]
-    outputs:
-      child-workspace-package-names: ${{ steps.workspace-package-names.outputs.child-workspace-package-names }}
-    steps:
-      - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v1
-        with:
-          is-high-risk-environment: true
-          cache-node-modules: ${{ matrix.node-version == '22.x' }}
-      - name: Fetch workspace package names
-        id: workspace-package-names
-        run: |
-          echo "child-workspace-package-names=$(yarn workspaces list --no-private --json | jq --slurp --raw-output 'map(.name) | @json')" >> "$GITHUB_OUTPUT"
-        shell: bash
-
   lint:
     name: Lint (${{ matrix.script }})
     runs-on: ubuntu-latest
-    needs: prepare
     strategy:
       matrix:
         node-version: [22.x]
@@ -54,17 +33,12 @@ jobs:
   validate-changelog:
     name: Validate changelog
     runs-on: ubuntu-latest
-    needs: prepare
-    strategy:
-      matrix:
-        node-version: [22.x]
-        package-name: ${{ fromJson(needs.prepare.outputs.child-workspace-package-names) }}
     steps:
       - name: Checkout and setup environment
         uses: MetaMask/action-checkout-and-setup@v1
         with:
           is-high-risk-environment: true
-      - run: yarn workspace ${{ matrix.package-name }} changelog:validate
+      - run: yarn workspaces foreach --all --no-private --parallel run changelog:validate
       - name: Require clean working directory
         shell: bash
         run: |
@@ -76,7 +50,6 @@ jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
-    needs: prepare
     strategy:
       matrix:
         node-version: [22.x]
@@ -97,8 +70,6 @@ jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
-    needs:
-      - prepare
     strategy:
       matrix:
         node-version: [18.x, 20.x, 22.x]