fix(VTooltip): Add aria-label attribute to Vtooltip

[mueller-jens]

Description

fixed #21242

added aria-label attribute to v-tooltip

Markup:

<template>
  <v-app>
    <v-container>
      <v-tooltip text="Tooltip">
        <template v-slot:activator="{ props }">
          <v-btn v-bind="props">Hover Over Me</v-btn>
        </template>
      </v-tooltip>
    </v-container>
  </v-app>
</template>

axe output before change:

after the change:

[J-Sek]

Is it only Orca or does all screen readers get confused and read first tooltip instead of second? example. It is not related to the changes, just curious if anyone noticed the bug.