Mysql Tests: For mysql5.7 integration tests use utf8mb4 charset (#69953)

for mysql5.7 integration tests, use utf8mb4 charset

.drone.yml

@@ -846,7 +846,9 @@ services:
   volumes:
   - name: postgres
     path: /var/lib/postgresql/data/pgdata
-- environment:
+- commands:
+  - docker-entrypoint.sh mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
+  environment:
     MYSQL_DATABASE: grafana_tests
     MYSQL_PASSWORD: password
     MYSQL_ROOT_PASSWORD: rootpass
@@ -1943,7 +1945,9 @@ services:
   volumes:
   - name: postgres
     path: /var/lib/postgresql/data/pgdata
-- environment:
+- commands:
+  - docker-entrypoint.sh mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
+  environment:
     MYSQL_DATABASE: grafana_tests
     MYSQL_PASSWORD: password
     MYSQL_ROOT_PASSWORD: rootpass
@@ -5287,7 +5291,9 @@ services:
   volumes:
   - name: postgres
     path: /var/lib/postgresql/data/pgdata
-- environment:
+- commands:
+  - docker-entrypoint.sh mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
+  environment:
     MYSQL_DATABASE: grafana_tests
     MYSQL_PASSWORD: password
     MYSQL_ROOT_PASSWORD: rootpass
@@ -6013,7 +6019,9 @@ services:
   volumes:
   - name: postgres
     path: /var/lib/postgresql/data/pgdata
-- environment:
+- commands:
+  - docker-entrypoint.sh mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
+  environment:
     MYSQL_DATABASE: grafana_tests
     MYSQL_PASSWORD: password
     MYSQL_ROOT_PASSWORD: rootpass
@@ -6553,7 +6561,9 @@ services:
   volumes:
   - name: postgres
     path: /var/lib/postgresql/data/pgdata
-- environment:
+- commands:
+  - docker-entrypoint.sh mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
+  environment:
     MYSQL_DATABASE: grafana_tests
     MYSQL_PASSWORD: password
     MYSQL_ROOT_PASSWORD: rootpass
@@ -6730,7 +6740,9 @@ services:
   volumes:
   - name: postgres
     path: /var/lib/postgresql/data/pgdata
-- environment:
+- commands:
+  - docker-entrypoint.sh mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
+  environment:
     MYSQL_DATABASE: grafana_tests
     MYSQL_PASSWORD: password
     MYSQL_ROOT_PASSWORD: rootpass

scripts/drone/services/services.star

@@ -39,6 +39,7 @@ def integration_test_services():
                 "MYSQL_PASSWORD": "password",
             },
             "volumes": [{"name": "mysql57", "path": "/var/lib/mysql"}],
+            "commands": ["docker-entrypoint.sh mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci"],
         },
         {
             "name": "mysql80",