Bump to SQL*Server 15 (2019) CU32 (ubuntu 20.04)

[scara]

Bump CU to avoid startup crash on Ubuntu 24.04: CU26+ will start fine on both Ubuntu 22.04 and Ubuntu 24.04.

Changes due to latest SQL*Server 15 (2019) CU32:

1. The path /opt/mssql-tools/bin/sqlcmd changed to /opt/mssql-tools18/bin/sqlcmd.
2. Adds -C to trust the server certificate.
3. Disable SQL Server forcing all connections to be encrypted.

Refs:

• https://learn.microsoft.com/en-us/sql/linux/sql-server-linux-configure-mssql-conf?view=sql-server-ver15#specify-tls-settings

Fixes #21.

[scara]

Tested sampling some unit tests:

1. Prepare the lab:

$ git clone https://github.com/scara/moodle-db-mssql
$ cd ./moodle-db-mssql
$ git checkout 21-Bump-CU-To-Avoid-Startup-Crash-On-Ubuntu-24d04
$ docker build -t moodle-db-mssql .
$ cd ..
$ curl -O https://packaging.moodle.org/stable500/moodle-5.0.tgz
$ tar zxf moodle-5.0.tgz
$ git clone https://github.com/moodlehq/moodle-docker
$ export MOODLE_DOCKER_WWWROOT=$(pwd)/moodle
$ export MOODLE_DOCKER_DB=mssql
$ cd moodle-docker
$ cp config.docker-template.php $MOODLE_DOCKER_WWWROOT/config.php

2. Configure the dev environment to use the just built image:

$ sed -i 's/moodlehq\/moodle-db-mssql/moodle-db-mssql/g' db.mssql.yml
$ bin/moodle-docker-compose up -d
$ bin/moodle-docker-wait-for-db

3. Run some tests:

$ bin/moodle-docker-compose exec webserver php admin/tool/phpunit/cli/init.php
$ bin/moodle-docker-compose exec webserver vendor/bin/phpunit lib/ddl/tests/ddl_test.php
$ bin/moodle-docker-compose exec webserver vendor/bin/phpunit lib/dml/tests/sqlsrv_native_moodle_database_test.php

4. Shutdown the dev environment:

$ bin/moodle-docker-compose down -v

HTH,
Matteo