Migrate SKIPIF -> EXTENSIONS (#7138)

This is an automated migration of most SKIPIF extension_loaded checks.

Implement server type/version for PDO_ODBC getAttr (#6935)

As an example using the IBM Db2i ODBC driver:

PDO::ATTR_SERVER_INFO: DB2/400 SQL
PDO::ATTR_SERVER_VERSION: 07.

Implement server type/version for PDO_ODBC getAttr (#6935)

As an example using the IBM Db2i ODBC driver:

PDO::ATTR_SERVER_INFO: DB2/400 SQL
PDO::ATTR_SERVER_VERSION: 07.02.0015

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