Install the SQLite ODBC driver in CI

[iliaal]

The ext/odbc and pdo_odbc regression tests connect through a real ODBC driver (Driver=SQLite3), which CI never installed, so they skipped on every lane. libsqliteodbc registers the SQLite3 driver and supports Database=:memory:, so the tests run without a database server. Alpine has no such package, so those lanes keep skipping. Follow-up to the driver discussion on #22672.

[NattyNarwhal]

I'll let others comment, but this looks OK to me.

For FreeBSD, we can install sqliteodbc... except there are no ODBC tests being performed there. For ppc64, I'll install it there.

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For tests: any tests that don't rely on specific driver quirks, we should continue to use PDO_ODBC_TEST_DSN/ODBC_TEST_DSN. While some assume SQL Server (for dialect or behaviour reasons), most don't, and we could in theory test those with the SQLite ODBC driver just using it there (if we didn't mind cleaning up assumptions/adding some skipifs for not SQL Server).

For the tests you're adding that have to rely on the SQLIte ODBC driver behaviour, we could hardcode the connection string, but it doesn't seem quite right to hardcode it (i.e. in case of different driver name in odbcinst). We could just make them use the standard ODBC test DSN env vars, and re-run ODBC tests with a different matrix? But that seems pretty complicated, so maybe I'm overthinking that.

[iliaal]

Just to keep it simple maybe add PDO_ODB_SQLITE_DSN and the new tests that rely on sqlite can use that and pre-existing keep using what is there