Run arm64 unit and integration tests in a container.

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

.github/workflows/tests-arm64.yaml

@@ -11,6 +11,10 @@ jobs:
     if: github.repository == 'etcd-io/etcd'
     runs-on: [self-hosted, Linux, ARM64]
     needs: goversion
+    container: golang:1.19-bullseye
+    defaults:
+      run:
+        shell: bash
     strategy:
       fail-fast: false
       matrix:
@@ -21,6 +25,8 @@ jobs:
         - linux-arm64-unit-4-cpu-race
     steps:
     - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+    # https://github.com/actions/checkout/issues/1169
+    - run: git config --system --add safe.directory '*'
     - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
       with:
         go-version: ${{ needs.goversion.outputs.goversion }}