test(mssql): add support for running tests against ms sql server (#91)

[Alexandre-T]

MS-SQL Server support :

• scaffold phpunit test suites for MSSQL Server by @DaveHint
• add docker compose services for MSSQL Server by @DaveHint
• create the test database main when MSSQL Server starts by @DaveHint
• install PDO drivers for MSSQL Server in php8 service by @DaveHint
• configure SqlServerPlatform as supported platform in OrmTestCase by @DaveHint
• add additional database driver options when building the connection parameters to trust the sql server's self signed certificate by @DaveHint
• add test commands to composer.json by @DaveHint
• add phpunit files for the CI/CD by @Alexandre-T
• add sql server services in the CI by @Alexandre-T

[coveralls]

coverage: 95.599%. remained the same
when pulling 51a5cc4 on mssql-feature
into 9872506 on main.

[coveralls]

coverage: 95.599%. remained the same
when pulling 476d8dc on mssql-feature
into 9872506 on main.

[coveralls]

coverage: 95.599%. remained the same
when pulling 3b9936a on mssql-feature
into 9872506 on main.

[coveralls]

coverage: 95.599%. remained the same
when pulling c00a211 on mssql-feature
into 9872506 on main.