feat: support all_users & all_sender_channels for segment

[kanat]

Related ticket:

• https://stream-io.atlassian.net/browse/PBE-1383

Related PRs:

• https://github.com/GetStream/chat/pull/6066
• feat: add support for all_sender_channels for segment stream-chat-js#1258

Description

This PR enables support for sending a campaign:

• to all users
• to all channels where the sender is a member.

CLA

• I have signed the Stream CLA (required).
• The code changes follow best practices
• Code changes are tested (add some information if not applicable)

Description of the pull request

[akupila]

LGTM, but Python is not my strong suit so maybe good to wait for somebody else to have a look too

Maybe next time consider adding a short description in the PR for what it does (not just a Jira link). This makes the PR a bit easier to review as you don't need to jump to Jira to get context. It's also easier for people outside Stream, who won't have access to Jira

[kanat]

Thank you @akupila ❤️

I've added a description section :)

[JimmyPettersson85]

LGTM

There's just a small nitpick, you can avoid the duplicate verify_segment_id methods by having this on the base class (it can have concrete implementations) and call super().verify_segment_id() instead.