chore: Enhance acceptance test to cover webhook-based autoscaling for repo and org runners

Adds what I used while verifying #534

acceptance/testdata/hra.yaml

@@ -0,0 +1,25 @@
+apiVersion: actions.summerwind.dev/v1alpha1
+kind: HorizontalRunnerAutoscaler
+metadata:
+  name: actions-runner-aos-autoscaler
+spec:
+  scaleTargetRef:
+    name: example-runnerdeploy
+  scaleUpTriggers:
+  - githubEvent:
+      checkRun:
+        types: ["created"]
+        status: "queued"
+    amount: 1
+    duration: "1m"
+  minReplicas: 0
+  maxReplicas: 5
+  metrics:
+  - type: PercentageRunnersBusy
+    scaleUpThreshold: '0.75'
+    scaleDownThreshold: '0.3'
+    scaleUpFactor: '2'
+    scaleDownFactor: '0.5'
+  - type: TotalNumberOfQueuedAndInProgressWorkflowRuns
+    repositoryNames:
+    - ${TEST_REPO}

acceptance/testdata/org.hra.yaml

@@ -0,0 +1,25 @@
+apiVersion: actions.summerwind.dev/v1alpha1
+kind: HorizontalRunnerAutoscaler
+metadata:
+  name: org
+spec:
+  scaleTargetRef:
+    name: org-runnerdeploy
+  scaleUpTriggers:
+  - githubEvent:
+      checkRun:
+        types: ["created"]
+        status: "queued"
+    amount: 1
+    duration: "1m"
+  minReplicas: 0
+  maxReplicas: 5
+  metrics:
+  - type: PercentageRunnersBusy
+    scaleUpThreshold: '0.75'
+    scaleDownThreshold: '0.3'
+    scaleUpFactor: '2'
+    scaleDownFactor: '0.5'
+  - type: TotalNumberOfQueuedAndInProgressWorkflowRuns
+    repositoryNames:
+    - ${TEST_ORG_REPO}

acceptance/testdata/org.runnerdeploy.yaml

@@ -0,0 +1,37 @@
+apiVersion: actions.summerwind.dev/v1alpha1
+kind: RunnerDeployment
+metadata:
+  name: org-runnerdeploy
+spec:
+#  replicas: 1
+  template:
+    spec:
+      organization: ${TEST_ORG}
+
+      #
+      # Custom runner image
+      #
+      image: ${RUNNER_NAME}:${RUNNER_TAG}
+      imagePullPolicy: IfNotPresent
+
+      #
+      # dockerd within runner container
+      #
+      ## Replace `mumoshu/actions-runner-dind:dev` with your dind image
+      #dockerdWithinRunnerContainer: true
+      #image: mumoshu/actions-runner-dind:dev
+
+      #
+      # Set the MTU used by dockerd-managed network interfaces (including docker-build-ubuntu)
+      #
+      #dockerMTU: 1450
+
+      #Runner group
+      # labels:
+      # - "mylabel 1"
+      # - "mylabel 2"
+
+      #
+      # Non-standard working directory
+      #
+      # workDir: "/"