workflows: add eni-max-pods updater

Signed-off-by: Kush Upadhyay <[email protected]>

Author: koooosh

.github/workflows/update-eni-max-pods.yaml

@@ -0,0 +1,61 @@
+name: "Update ENI max pods"
+on:
+  workflow_dispatch:
+  schedule:
+    # Every Monday at 9AM PST
+    - cron: "0 17 * * 1"
+permissions:
+  id-token: write
+  contents: write
+  pull-requests: write
+jobs:
+  update-eni-max-pods:
+    if: github.repository == 'bottlerocket-os/bottlerocket-core-kit'
+    timeout-minutes: 10
+    runs-on: ubuntu-latest
+    steps:
+      - name: Configure credentials
+        uses: aws-actions/configure-aws-credentials@7474bc4690e29a8392af63c5b98e7449536d5c3a # 4.3.1
+        with:
+          aws-region: ${{ secrets.ENI_MAX_PODS_UPDATER_REGION }}
+          role-to-assume: ${{ secrets.ENI_MAX_PODS_UPDATER_ROLE_ARN }}
+          role-duration-seconds: 900 # 15 minutes
+
+      - name: Checkout bottlerocket-core-kit
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # 5.0.0
+        with:
+          repository: bottlerocket-os/bottlerocket-core-kit
+          ref: refs/heads/develop
+          path: bottlerocket-core-kit/
+
+      - name: Checkout amazon-vpc-cni-k8s
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # 5.0.0
+        with:
+          repository: aws/amazon-vpc-cni-k8s
+          ref: refs/heads/master
+          path: amazon-vpc-cni-k8s/
+
+      - name: Run generation script and copy output
+        run: |
+          cd amazon-vpc-cni-k8s/
+          make generate-limits
+          cp misc/eni-max-pods.txt ../bottlerocket-core-kit/packages/os/eni-max-pods
+
+      - name: Create pull request
+        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # 7.0.8
+        with:
+          branch: update-eni-max-pods
+          path: bottlerocket-core-kit/
+          base: develop
+          delete-branch: true
+          add-paths: |
+            packages/os/eni-max-pods
+          commit-message: "Update eni-max-pods"
+          committer: "GitHub <[email protected]>"
+          author: "GitHub <[email protected]>"
+          title: "Update eni-max-pods"
+          body: |
+            Generated by [aws/amazon-vpc-cni-k8s](https://github.com/aws/amazon-vpc-cni-k8s):
+            ```
+            make generate-limits
+            ```