Simplify passing host configuration direct to Index client

[jhamon]

Problem

In production situations, it's important people be able to configure the client in a way that does not hit the control plane to find out the host url. This was possible, but now that I'm writing docs I realized this is cumbersome because the positional index name arg was still being required even though it wasn't being used in that scenario.

We want it to be easy.

Solution

Before

from pinecone.grpc import PineconeGRPC

pc = PineconeGRPC(api_key="key")

# Targeting by name is easy
index = pc.Index('blah')

# Targeting by host url is awkward
index = pc.Index('required-but-unused-index-name', host='blah-24vnhz6.svc.apw5-4e34-81fa.pinecone.io')

After

from pinecone.grpc import PineconeGRPC

pc = PineconeGRPC(api_key="key")

# This still works
index = pc.Index('blah')

# This now works
index = pc.Index(host='blah-24vnhz6.svc.apw5-4e34-81fa.pinecone.io')

# Or pass both if you really want, but not needed.
index = pc.Index(name='blah', host='blah-24vnhz6.svc.apw5-4e34-81fa.pinecone.io')

Type of Change

• New feature (non-breaking change which adds functionality)

Test Plan

Update integration tests to check it can still issue data calls without errors no matter how it is configured.

[tdonia]

💜

[austin-denoble]

Nice! 🚢