DX-1821: Deprecate Llms

[CahidArda]

No description provided.

[linear]

DX-1821 qstash-py - deprecate LLMs

[mdumandag]

We also need to remove/deprecate api fields (like in dlq filter/event filter/messages/destinations/... etc).

[yunusemreozdemir]

I think there is a model-provider mismatch here, same for async test:
https://github.com/upstash/qstash-py/blob/DX-1821-deprecate-llms/tests/test_message.py#L241

[mdumandag]

there is one more leftover api field that should be removed:
see message.py#298

[mdumandag]

now, there is a duplicate example. see the line 103, Publish a JSON message to LLM Using Custom Providers

we should remove this or that

[mdumandag]

Apart from this PR, I think we have renamed events to logs in JS SDK, we can make the same here and remove the events api altogether since this is a major version bump