Templated arm64 e2e workflows for main and release-3.5.

Signed-off-by: James Blair <mail@jamesblair.net>

.github/workflows/e2e-arm64-nightly.yaml

@@ -0,0 +1,19 @@
+---
+name: E2E Arm64 Nightly
+permissions: read-all
+on:
+  # schedules always run against the main branch, hence we have to create separate jobs
+  # with individual checkout actions for each of the active release branches
+  schedule:
+    - cron: '30 1 * * *' # runs daily at 1:30 am.
+jobs:
+  main-arm64:
+    uses: ./.github/workflows/e2e-arm64-template.yaml
+    with:
+      etcdBranch: main
+      e2eTestCmd: make test-e2e-release
+  release-35-arm64:
+    uses: ./.github/workflows/e2e-arm64-template.yaml
+    with:
+      etcdBranch: release-3.5
+      e2eTestCmd: PASSES='build e2e' COVER='false' ./test.sh

.github/workflows/e2e-arm64-template.yaml

@@ -1,8 +1,14 @@
 ---
-name: E2E-arm64
+name: Reusable Arm64 E2E Workflow
 on:
-  schedule:
-    - cron: '0 1 * * *' # runs daily at 1am.
+  workflow_call:
+    inputs:
+      etcdBranch:
+        required: true
+        type: string
+      e2eTestCmd:
+        required: false
+        type: string
 permissions: read-all
 jobs:
   test:
@@ -20,6 +26,8 @@ jobs:
           - linux-arm64-e2e
     steps:
       - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+        with:
+          ref: "${{ inputs.etcdBranch }}"
       # https://github.com/actions/checkout/issues/1169
       - run: git config --system --add safe.directory '*'
       - id: goversion
@@ -36,7 +44,7 @@ jobs:
           echo "${TARGET}"
           case "${TARGET}" in
             linux-arm64-e2e)
-              GOOS=linux GOARCH=arm64 CPU=4 EXPECT_DEBUG=true RACE=true make test-e2e-release
+              GOOS=linux GOARCH=arm64 CPU=4 EXPECT_DEBUG=true RACE=true ${{ inputs.e2eTestCmd }}
               ;;
             *)
               echo "Failed to find target"