I would like to convert a TypedClient to a regular Client; my main
use-case for this is so I can use it for the bulk indexer.

Converting a TypedClient to Client is fairly straight-forward:

	func ToClient(tc *elasticsearch.TypedClient) *elasticsearch.Client {
		c := &elasticsearch.Client{
			BaseClient: tc.BaseClient,
		}
		c.API = esapi.New(c)
		return c
	}

Which works, but also gives an error on go vet;

	literal copies lock value from ns.TypedClient.BaseClient:
	github.com/elastic/go-elasticsearch/v8.BaseClient contains sync.RWMutex

This fixes that.