Upgrade gRPC connections configuration and strategies to support round-robin resolving for frontends

[Spikhalskiy]

Go SDK recently implemented changes in gRPC connection and request configurations.

Find more details here:
https://pkg.go.dev/go.temporal.io/sdk/internal#ClientOptions
https://github.com/grpc/grpc/blob/master/doc/load-balancing.md

We need to support resolvers, including the one that round-robin between known frontends. This will let us remove hacks like WorkflowServiceStubsOptions#grpcReconnectFrequency that forcefully reestablish connections to achieve load balancing.

Internal discussion in company's slack: https://temporaltechnologies.slack.com/archives/C01FG4BRQVB/p1637267948416500

gRPC Load balancing doc:
https://github.com/grpc/grpc/blob/master/doc/load-balancing.md

Related task in GoSDK:
temporalio/sdk-go#577

Related task: #815