feat(webhook): add flags parameter to webhook edit methods

[shiftinv]

Summary

Adds the flags parameter to Webhook.edit_message, WebhookMessage.edit, and InteractionResponse.edit_message. Only changing the suppress_embeds flag is currently supported¹.

Seems like this was quietly added in discord/discord-api-docs@a7dfd25

Checklist

• If code changes were made, then they have been tested
  • I have updated the documentation to reflect the changes
  • I have formatted the code properly by running pdm lint
  • I have type-checked the code by running pdm pyright
• This PR fixes an issue
• This PR adds something new (e.g. new method or parameters)
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

Footnotes

1. is_components_v2 is also technically supported, but part of feat: components v2 #1294 ↩