[DX] Proposal: Provider configuration

[databyjp]

Some of our users find additional imports of classes & namespaces challenging.

So, we propose to update how the integrations (e.g. Google, Cohere, OpenAI, etc.) are provided in the client, through an API like this:

client.configure_provider.cohere(
		api_key=os.getenv("COHERE_KEY")
		requests_per_minute_embeddings=1000
		requests_per_minute_generative=500,		
)
client.configure_provider.aws(
		secret="aws_s", 
		access="aws_a"
)

client.configure_provider.view_all()  # <-- A potential method for users to see what is configured. Could return all configs set, with partially redacted API keys?

from:

from weaviate.classes.config import Integrations

integrations = [
    # Each model provider may expose different parameters
    Integrations.cohere(
        api_key=cohere_key,
        requests_per_minute_embeddings=rpm_embeddings,
    ),
    Integrations.openai(
        api_key=openai_key,
        requests_per_minute_embeddings=rpm_embeddings,
        tokens_per_minute_embeddings=tpm_embeddings,   # e.g. OpenAI also exposes tokens per minute for embeddings
    ),
]
client.integrations.configure(integrations)

@sebawita @dirkkul