Provide message variable instead of sqlState in Exception

[ValentinAUCLERC]

Hello

I don't understand why the exception isn't returning "message" variable like everything does.
When trying to try/catch with a $e->getMessage() nothing appears.

I didn't understand why the sqlState is used, maybe if it's useful vars could be duplicated ?

[anesvetaevtrackad]

@ValentinAUCLERC
I join in to this PR
I think this is the reason why after update from 1.5.6 to 2.0.1 I stopped getting error strings in exceptions
It makes debugging harder

I get string like

Message: An exception occurred while executing a query:
File: /.../vendor/friendsofdoctrine/dbal-clickhouse/src/ClickHouseExceptionConverter.php

If I apply your code changes, I get correct error like, e.g.:

Message: An exception occurred while executing a query: Can`t find meta
File: /usr/local/codebase/vendor/friendsofdoctrine/dbal-clickhouse/src/ClickHouseExceptionConverter.php

It looks like a bug
Hope some of the maintainers will pay attention to this PR
@asanikovich could you please take a look?

Thank you in advance

[anesvetaevtrackad]

@mochalygin Hello
Could you please take a look at this PR?