MenuToggle does not derive accessible name from visible text children

Description

When MenuToggle renders with visible text children (e.g., <MenuToggle>Actions</MenuToggle>), it does not automatically derive its accessible name from that text. Consumers must manually duplicate the text in an aria-label prop, which is error-prone and violates WCAG 2.5.3 (Label in Name).

WCAG Impact

• 2.5.3 Label in Name — For UI components with visible text labels, the accessible name must contain the visible text. If MenuToggle doesn't derive its accessible name from its children, speech-input users who say "click Actions" may not activate the correct control.

Steps to Reproduce

1. Render <MenuToggle>Actions</MenuToggle> without an aria-label
2. Inspect the element's computed accessible name in browser DevTools or a screen reader
3. The accessible name may not match the visible "Actions" text

Expected Behavior

MenuToggle should derive its accessible name from its text children by default, similar to how a standard <button>Actions</button> does. An explicit aria-label should only be needed for icon-only toggles (kebab menus).

Current Behavior

Consumers must manually provide aria-label="Actions" even when the text "Actions" is already visible in the toggle. Our codebase (ansible/ansible-ui) has hardcoded fallback aria-label values like 'kebab dropdown toggle' and 'dropdown toggle' that don't match the visible text, precisely because the component doesn't handle this automatically.

Jira Issue: PF-4545

Comienza por el componente MenuToggle e inspecciona cómo se calcula su nombre accesible cuando recibe elementos hijos de texto visibles sin un aria-label. Compara este comportamiento con un botón estándar y determina cómo deberían comportarse las etiquetas explícitas en los toggles que solo tienen iconos. Se considera terminado cuando los elementos hijos de texto proporcionan el nombre accesible de forma predeterminada, mientras que los valores explícitos de aria-label siguen estando disponibles para usarlos en toggles que solo tienen iconos.