ci: use mariadb instead of mysql

.github/helper/install.sh

@@ -4,7 +4,9 @@ set -ex
 
 cd ~ || exit
 
-sudo apt-get update && sudo apt-get install redis-server libcups2-dev --fix-missing
+sudo apt update
+sudo apt remove mysql-server mysql-client
+sudo apt install libcups2-dev redis-server mariadb-client-10.6
 
 pip install frappe-bench
 
@@ -14,14 +16,14 @@ bench init --skip-assets --frappe-path ~/frappe --python "$(which python)" frapp
 mkdir ~/frappe-bench/sites/test_site
 cp -r "${GITHUB_WORKSPACE}/.github/helper/site_config.json" ~/frappe-bench/sites/test_site/
 
-mysql --host 127.0.0.1 --port 3306 -u root -proot -e "SET GLOBAL character_set_server = 'utf8mb4'"
-mysql --host 127.0.0.1 --port 3306 -u root -proot -e "SET GLOBAL collation_server = 'utf8mb4_unicode_ci'"
+mariadb --host 127.0.0.1 --port 3306 -u root -proot -e "SET GLOBAL character_set_server = 'utf8mb4'"
+mariadb --host 127.0.0.1 --port 3306 -u root -proot -e "SET GLOBAL collation_server = 'utf8mb4_unicode_ci'"
 
-mysql --host 127.0.0.1 --port 3306 -u root -proot -e "CREATE USER 'test_frappe'@'localhost' IDENTIFIED BY 'test_frappe'"
-mysql --host 127.0.0.1 --port 3306 -u root -proot -e "CREATE DATABASE test_frappe"
-mysql --host 127.0.0.1 --port 3306 -u root -proot -e "GRANT ALL PRIVILEGES ON \`test_frappe\`.* TO 'test_frappe'@'localhost'"
+mariadb --host 127.0.0.1 --port 3306 -u root -proot -e "CREATE USER 'test_frappe'@'localhost' IDENTIFIED BY 'test_frappe'"
+mariadb --host 127.0.0.1 --port 3306 -u root -proot -e "CREATE DATABASE test_frappe"
+mariadb --host 127.0.0.1 --port 3306 -u root -proot -e "GRANT ALL PRIVILEGES ON \`test_frappe\`.* TO 'test_frappe'@'localhost'"
 
-mysql --host 127.0.0.1 --port 3306 -u root -proot -e "FLUSH PRIVILEGES"
+mariadb --host 127.0.0.1 --port 3306 -u root -proot -e "FLUSH PRIVILEGES"
 
 install_whktml() {
     wget -O /tmp/wkhtmltox.tar.xz https://github.com/frappe/wkhtmltopdf/raw/master/wkhtmltox-0.12.3_linux-generic-amd64.tar.xz
@@ -42,7 +44,6 @@ bench get-app payments --resolve-deps
 bench get-app https://github.com/frappe/erpnext --branch "$BRANCH_TO_CLONE" --resolve-deps
 bench setup requirements --dev
 
-
 bench start &> bench_run_logs.txt &
 CI=Yes bench build --app frappe &
 bench --site test_site reinstall --yes