github/workflows: add ARM64 tests

Restore ARM64 test workflows. Remove the conditional to run only ARM
tests in the upstream repository, as GitHub ARM runners are now publicly
available.

Signed-off-by: Ivan Valdes <ivan@vald.es>

.github/workflows/tests-template.yml

@@ -15,8 +15,6 @@ permissions: read-all
 
 jobs:
   test-linux:
-    # this is to prevent arm64 jobs from running at forked projects
-    if: ${{ github.repository == 'etcd-io/bbolt' || inputs.runs-on == 'ubuntu-latest' }}
     strategy:
       fail-fast: false
       matrix:

.github/workflows/tests_arm64.yaml

@@ -0,0 +1,26 @@
+---
+name: Tests ARM64
+permissions: read-all
+on: [push, pull_request]
+jobs:
+  test-linux-arm64:
+    uses: ./.github/workflows/tests-template.yml
+  test-linux-arm64-race:
+    uses: ./.github/workflows/tests-template.yml
+    with:
+      runs-on: ubuntu-24.04-arm
+      targets: "['linux-unit-test-4-cpu-race']"
+
+  coverage:
+    needs:
+      - test-linux-arm64
+      - test-linux-arm64-race
+    runs-on: ubuntu-24.04-arm
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - id: goversion
+        run: echo "goversion=$(cat .go-version)" >> "$GITHUB_OUTPUT"
+      - uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
+        with:
+          go-version: ${{ steps.goversion.outputs.goversion }}
+      - run: make coverage