Mark connection constructors internal

Deprecate driver exception conversion APIs

Deprecate some DBALException factory methods

Deprecate AbstractPlatform::fixSchemaElementName()

Fix more issues introduced by the deprecation of driver classes

Restore the PortWithoutHost exception parent class

Remove the no longer needed error suppressions

Deprecate ServerInfoAwareConnection#requiresQueryForServerVersion() as an implementation detail

Deprecate PingableConnection in favor of handling lost connection

Update Slevomat Coding Standard to 6.3.10

Deprecate ExceptionConverterDriver

Fixes for the recently introduced driver-level deprecations

Update PHPStan to 0.12.31

Deprecate DriverException::getErrorCode()

Mark non-interface OCI8 driver methods internal