Handle `disable_on_timeout` in DMs

[tibue99]

Summary

In some cases, view buttons are not disabled in DMs when disable_on_timeout is set to True.

Reproduction Steps

1. Run /party
2. Click the button
3. Wait for timeout

Minimal Reproducible Code

import discord

bot = discord.Bot()

class PartyButton(discord.ui.View):
    def __init__(self):
        super().__init__(timeout=10, disable_on_timeout=True)

    @discord.ui.button(label="Party")
    async def party(self, button, interaction):
        await interaction.edit(content="🎉")


@bot.slash_command(
    contexts={discord.InteractionContextType.private_channel},
    integration_types={discord.IntegrationType.user_install},
)
async def party(ctx):
    await ctx.respond(view=PartyButton())

bot.run("")

Expected Results

Button gets disabled

Actual Results

Task exception was never retrieved
future: <Task finished name='discord-ui-view-timeout-37f1819640748e5c45353904a3edb8d9' coro=<View.on_timeout() done, defined at C:\Users\Timo\Desktop\cookie\.venv\Lib\site-packages\discord\ui\view.py:364> exception=Forbidden('403 Forbidden (error code: 50001): Missing Access')>
Traceback (most recent call last):
  File "C:\Users\Timo\Desktop\cookie\.venv\Lib\site-packages\discord\ui\view.py", line 381, in on_timeout
    m = await message.edit(view=self)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Timo\Desktop\cookie\.venv\Lib\site-packages\discord\message.py", line 1634, in edit
    data = await self._state.http.edit_message(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        self.channel.id, self.id, **payload
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "C:\Users\Timo\Desktop\cookie\.venv\Lib\site-packages\discord\http.py", line 371, in request
    raise Forbidden(response, data)
discord.errors.Forbidden: 403 Forbidden (error code: 50001): Missing Access

Intents

System Information

• Python v3.13.0-final
• py-cord v2.6.1-final
• aiohttp v3.11.12
• system info: Windows 11 10.0.26100

Checklist

• I have searched the open issues for duplicates.
• I have shown the entire traceback, if possible.
• I have removed my token from display, if visible.

Additional Context

The on_timeout event contains the following code

            if not self._message or self._message.flags.ephemeral:
                message = self.parent
            else:
                message = self.message

The button would be disabled correctly if self.parent would be used for editing. However, due to the condition it uses self.message, which trows an error.