Allow disabled- and form-Attribute on fieldsets

[mimmi20]

Q	A
Documentation	no
Bugfix	no
BC Break	no
New Feature	yes
RFC	no
QA	no

Description

This PR wants to allow the Attributes "disabled" and "form" on fieldsets. This is related to Issue #155.

[froschdesign]

@mimmi20
The name attribute is removed here:

laminas-form/src/View/Helper/FormCollection.php

Lines 139 to 141 in 06ececc

	if (! isset($this->doctypesAllowedToHaveNameAttribute[$this->getDoctype()])) {
	unset($attributes['name']);
	}

A replacement can be:

if (! $this->getDoctypeHelper()->isHtml5()) {
    unset(
        $attributes['name'],
        $attributes['disabled'],
        $attributes['form']
    );
}

The doctypesAllowedToHaveNameAttribute property can then be removed:

laminas-form/src/View/Helper/FormCollection.php

Lines 80 to 83 in 06ececc

	private array $doctypesAllowedToHaveNameAttribute = [
	Doctype::HTML5 => true,
	Doctype::XHTML5 => true,
	];

[Slamdunk]

Thank you 🎊