Bump google.golang.org/grpc to v1.56.1

[teddyking]

Description of your changes

This PR bumps the google.golang.org/grpc dependency from v1.49.0 to v1.56.1. v1.49.0 recently popped up in a grype scan of the image. I don't believe that provider-helm is vulnerable, but it would be good to bump the dependency anyway to stop it from appearing in scan outputs.

I have:

• [x] Read and followed Crossplane's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.

How has this code been tested

• [x] Run make test and ensured that all tests passed