Run small tests for arm64

Only the machine executor is available, leading to the following solution:
1. Start the main docker image, and the redis image needed by tests,
   joined by host networking.
2. Run small tests in the main docker image.
3. Collect and publish test results on the machine (not in docker) to
   simplify environment configuration.

When CircleCI finally supports docker arm64 executors,
this job can be simplified.

.circleci/template.yml

@@ -306,7 +306,7 @@ commands:
           name: Install pip3 and codecov packages
           command: |
             tools/circle-install-packages.sh python3-pip && \
-            pip3 install codecov && codecov
+            pip3 install codecov
   run_coverage_analysis:
     steps:
       - fetch_coverage_packages
@@ -315,8 +315,22 @@ commands:
           when: on_success
           command: |
             echo "Success!"
-            ./rebar3 codecov analyze
+            $EXEC ./rebar3 codecov analyze
             codecov --disable=gcov --env PRESET
+  run_small_tests:
+    steps:
+      - restore_workspace
+      - run:
+          name: Wait for redis
+          command: |
+            $EXEC tools/wait-for-it.sh -p 6379
+      - run:
+          name: Run Small Tests
+          command: |
+            $EXEC tools/test.sh -p small_tests -s true -e true
+      - run_coverage_analysis
+      - upload_results_to_aws
+      - publish_github_comment
   upload_results_to_aws:
     steps:
       - run:
@@ -499,8 +513,10 @@ jobs:
       - restore_certs
       - fetch_build_packages
       - run: $EXEC tools/configure with-all
+      - run: $EXEC tools/build-releases.sh
       - run: $EXEC make rel
       - cache_prod_build: {arch: arm64}
+      - persist_workspace
 
   build_in_docker:
     executor: << parameters.executor >>
@@ -546,18 +562,26 @@ jobs:
       PRESET: small_tests
       SKIP_AUTO_COMPILE: true
     steps:
-      - restore_workspace
+      - run_small_tests
+
+  small_tests_in_docker_arm64:
+    executor: arm64
+    environment:
+      DOCKER_IMAGE: *OTP25
+      EXEC: docker exec main
+      PRESET: small_tests
+      SKIP_AUTO_COMPILE: true
+    steps:
       - run:
-          name: Wait for redis
+          name: Run main docker image
           command: |
-            ./tools/wait-for-it.sh -p "6379"
+            docker run -dit -e PRESET -e SKIP_AUTO_COMPILE --name main --network host --rm \
+              -v `pwd`:`pwd` $DOCKER_IMAGE
       - run:
-          name: Run Small Tests
+          name: Run redis docker image
           command: |
-            ./tools/test.sh -p small_tests -s true -e true
-      - run_coverage_analysis
-      - upload_results_to_aws
-      - publish_github_comment
+            docker run -dit --name redis --network host --rm redis:__REDIS_VERSION__
+      - run_small_tests
 
   big_tests_in_docker:
     executor: << parameters.executor >>
@@ -789,6 +813,12 @@ workflows:
           requires:
             - otp_25_docker
           filters: *all_tags
+      - small_tests_in_docker_arm64:
+          name: small_tests_25_arm64
+          context: mongooseim-org
+          requires:
+            - otp_25_docker_arm64
+          filters: *all_tags
       # ============= BIG TESTS =============
       - big_tests_in_docker:
           name: internal_mnesia_25
@@ -931,9 +961,9 @@ workflows:
             - dynamic_domains_mysql_redis_25
             - dynamic_domains_mssql_mnesia_25
             - dialyzer_25
+            - small_tests_25_arm64
 
             - xref
             - edoc
 
-            - otp_25_docker_arm64
           filters: *all_tags