Return CircleCI config to previous state

I (and Copilot) had some ideas that might have fixed CircleCI but after trying 4 times nothing I did worked. This commit just reverts it back to the state it was before I meddled (sorry)!

Author: ara303

.circleci/config.yml

@@ -4,14 +4,13 @@ jobs:
     working_directory: ~/wp-cli/package-tests
     parallelism: 1
     docker:
-      - image: cimg/php:8.3
+      - image: circleci/php:7.4-bullseye
         environment:
           WP_CLI_TEST_DBHOST: 127.0.0.1:3306
           WP_CLI_TEST_DBROOTPASS: root
           WP_CLI_TEST_DBUSER: wp_cli_test
           WP_CLI_TEST_DBPASS: password1
-      - image: mariadb:11.4
-        command: mariadbd --skip-ssl
+      - image: circleci/mariadb:10.5
         environment:
           MYSQL_ROOT_PASSWORD: root
           MYSQL_DATABASE: wp_cli_test
@@ -20,8 +19,10 @@ jobs:
     steps:
       - checkout
       - run: |
+          sudo sh -c "printf '\ndeb http://ftp.us.debian.org/debian bullseye main\n' >> /etc/apt/sources.list"
           sudo apt-get update
-          sudo apt-get install -y mariadb-client
+          sudo docker-php-ext-install mysqli
+          sudo apt-get install mariadb-client
       - run: |
           echo -e "memory_limit = 1024M" | sudo tee /usr/local/etc/php/php.ini > /dev/null
       - run: |
@@ -36,4 +37,4 @@ jobs:
       - run: |
           WP_VERSION=latest composer test
           rm -rf '/tmp/wp-cli-test core-download-cache'
-          WP_VERSION=trunk composer test
+          WP_VERSION=trunk composer test