[8.x] Add prohibited_with and prohibited_without validation rules

[menthol]

Now that #36516 and #36667 are merged, I would like to add the missing rules to have same ruleset that the required ones.

This PR add :

• prohibited_with: Validate that this attribute does not exist when any indicated attribute exists.
• prohibited_with_all: Validate that this attribute does not exist when all indicated attributes exist.
• prohibited_without: Validate that this attribute does not exist when indicated attribute does not exist.
• prohibited_without_all: Validate that this attribute does not exist when all indicated attributes do not exist.

Example from the application I am currently working on:

Validator::validate([
    'start_date' => '2021-01', 
    'end_date' => '2021-03',
    'duration' => 'quarter'
], [
    'start_date' => ['date_format:Y-m', 'required_with:end_date'],
    'end_date' => [
        'date_format:Y-m',
        'prohibited_with:duration',
        'prohibited_without:start_date',
        'after_or_equal:options.start',
    ],
    'duration' => ['sometimes', 'in:month,quarter,custom'],
]);

[taylorotwell]

I don't know - I feel like we are kinda bloating the validator with some of this. If an attribute shouldn't be around when another attribute is present - just ignore it?

[mreduar]

Maybe this could be solved if we create a Rule::prohibitedIf() method?