fix: PHPDoc for request()

[Rom1-B]

Checklist before requesting a review

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• I have read the CONTRIBUTING document.
• I have performed a self-review of my code.
• I have added tests that prove my fix is effective or that my feature works.
• This change requires a documentation update.

Description

Prevent this type of error with a PHPStan analysis at level 5 in plugins:

Parameter #1 $tableorsql of method DBmysql::request() expects array<string>|QueryUnion|string, array<string, array<string, mixed>|string> given.

Screenshots (if appropriate):

[cedric-anne]

Parameter #1 $tableorsql of method DBmysql::request() expects array<string>|QueryUnion|string, array<string, array<string, mixed>|string> given.

What are the passed parameters ?

[Rom1-B]

I have several cases, here's an example:

$request = [
            'SELECT' => ['SUM' => 'consumed as sum'],
            'FROM'   => self::getTable(),
            'WHERE'  => [
                'plugin_credit_entities_id' => $ID
            ],
        ];

        $result = $DB->request($request);

As a reminder, here's what we have on GLPI 11: