[chore] Parallelize e2e tests (open-telemetry#31004)

Reorganizes job dependencies and parallelizes the k8s tests

Related to
open-telemetry#30880

**Testing**
https://github.com/open-telemetry/opentelemetry-collector-contrib/actions/runs/7745609364

.github/workflows/e2e-tests.yml

@@ -41,12 +41,12 @@ jobs:
         with:
           name: collector-binary
           path: ./bin/*
-  docker-build:
+
+  supervisor-test:
     runs-on: ubuntu-latest
     needs: collector-build
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
           go-version: ~1.20.8
@@ -69,6 +69,32 @@ jobs:
           name: collector-binary
           path: bin/
       - run: chmod +x bin/*
+      - name: Run opampsupervisor e2e tests
+        run: |
+          cd cmd/opampsupervisor
+          go test -v --tags=e2e
+
+  docker-build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: ~1.20.8
+          cache: false
+      - name: Cache Go
+        id: go-cache
+        timeout-minutes: 5
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/go/bin
+            ~/go/pkg/mod
+          key: go-cache-${{ runner.os }}-${{ hashFiles('**/go.sum') }}
+      - name: Install dependencies
+        if: steps.go-cache.outputs.cache-hit != 'true'
+        run: make -j2 gomoddownload
       - name: Build Docker Image
         run: |
           make docker-otelcontribcol
@@ -80,12 +106,22 @@ jobs:
         with:
           name: otelcontribcol
           path: /tmp/otelcontribcol.tar
-  kubernetes-test:
+
+  kubernetes-test-matrix:
     env:
       KUBECONFIG: /tmp/kube-config-otelcol-e2e-testing
     strategy:
       matrix:
-        k8s-version: ["v1.26.0", "v1.25.3", "v1.24.7", "v1.23.13"]
+        k8s-version:
+          - "v1.26.0"
+          - "v1.25.3"
+          - "v1.24.7"
+          - "v1.23.13"
+        component:
+          - receiver/k8sclusterreceiver
+          - processor/k8sattributesprocessor
+          - receiver/kubeletstatsreceiver
+          - receiver/k8sobjectsreceiver
     runs-on: ubuntu-latest
     needs: docker-build
     steps:
@@ -102,7 +138,7 @@ jobs:
           path: |
             ~/go/bin
             ~/go/pkg/mod
-          key: go-cache-${{ runner.os }}-${{ hashFiles('**/go.sum') }} 
+          key: go-cache-${{ runner.os }}-${{ hashFiles('**/go.sum') }}
       - name: Install dependencies
         if: steps.go-cache.outputs.cache-hit != 'true'
         run: make -j2 gomoddownload
@@ -127,51 +163,25 @@ jobs:
       - name: Kind load image
         run: |
           kind load docker-image otelcontribcol:latest --name kind
-      - name: run k8sclusterreceiver e2e tests
+      - name: Run e2e tests
         run: |
-          cd receiver/k8sclusterreceiver
+          cd ${{ matrix.component }}
           go test -v --tags=e2e
-      - name: run k8sattributesprocessor e2e tests
-        run: |    
-          cd processor/k8sattributesprocessor
-          go test -v --tags=e2e
-      - name: run receiver/kubeletstatsreceiver e2e tests
-        run: |
-          cd receiver/kubeletstatsreceiver
-          go test -v --tags=e2e
-      - name: run receiver/k8sobjectsreceiver e2e tests
-        run: |
-          cd receiver/k8sobjectsreceiver
-          go test -v --tags=e2e
-  supervisor-test:
+
+  kubernetes-test:
+    if: ${{ github.actor != 'dependabot[bot]' && always() }}
     runs-on: ubuntu-latest
-    needs: collector-build
+    needs: [ kubernetes-test-matrix ]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
-        with:
-          go-version: ~1.20.8
-          cache: false
-      - name: Cache Go
-        id: go-cache
-        timeout-minutes: 5
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/go/bin
-            ~/go/pkg/mod
-          key: go-cache-${{ runner.os }}-${{ hashFiles('**/go.sum') }} 
-      - name: Install dependencies
-        if: steps.go-cache.outputs.cache-hit != 'true'
-        run: make -j2 gomoddownload
-      - name: Download Collector Binary
-        uses: actions/download-artifact@v3
-        with:
-          name: collector-binary
-          path: bin/
-      - run: chmod +x bin/*
-      - name: Run opampsupervisor e2e tests
-        run: |    
-          cd cmd/opampsupervisor
-          go test -v --tags=e2e
+      - name: Print result
+        run: echo ${{ needs.kubernetes-test-matrix.result }}
+      - name: Interpret result
+        run: |
+          if [[ success == ${{ needs.kubernetes-test-matrix.result }} ]]
+          then
+            echo "All matrix jobs passed!"
+          else
+            echo "One or more matrix jobs failed."
+            false
+          fi