fix(menubar): remove unneeded roles `menu`, `menuitem`

All these roles are correctly set by `NcAction*` components when needed.
Setting these roles in mixins and menu bar puts them on wrong elements.

Signed-off-by: Grigorii K. Shartsev <me@shgk.me>

src/components/Menu/ActionAttachmentUpload.vue

@@ -26,7 +26,6 @@
 		:title="actionEntry.label"
 		:aria-label="actionEntry.label"
 		:container="menuIDSelector"
-		role="menu"
 		aria-haspopup>
 		<template #icon>
 			<component :is="icon"

src/components/Menu/ActionList.vue

@@ -23,7 +23,6 @@
 <template>
 	<NcActions :title="tooltip"
 		class="entry-list-action entry-action"
-		role="menu"
 		v-bind="state"
 		:container="menuIDSelector"
 		:aria-label="actionEntry.label"

src/components/Menu/ActionSingle.vue

@@ -120,7 +120,6 @@ export default {
 			attrs: {
 				title,
 				type: attrs.active ? 'primary' : 'tertiary',
-				role: 'menuitem',
 				'data-text-action-entry': actionEntry.key,
 				...attrs,
 			},