[11.x] Adds support for using castAsJson with a MariaDb connection

[haniha]

Hey Laravel team, hope you're doing well 🙂.

This PR implements compileJsonValueCast method for MariaDbGrammar and adds some test cases for castAsJson using MariaDbGrammar (related to #43863).

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More explanation:
While running some tests on a json column using a MariaDb connection faced an issue with castAsJson method.
Currently the method tries to run cast(? as json) on MariaDb which at the moment doesn't support casting to json using cast function (MariaDb cast docs).

It's returning this error:

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax;

Instead of using cast I've added JSON_QUERY which works as needed.
Tried to add it the same way as the related PR did for other databases.

Tested with MariaDb 10.6, 11.3, 11.4 and it works well.