[Feature Request] Cloud Ops API Client

[cretz]

Describe the solution you'd like

We need to bring https://github.com/temporalio/api-cloud into the fold. Implementation notes:

• Need every SDK to utilize as much existing gRPC service mechanism as it can, but leave room for potential high-level wrappers
  • Make new high-level client that only has access to the raw for now, knowing high-level wrappers may come
• Keep high-level cloud client separate from existing high-level client since this is not namespace specific
  • Share the connection/service/gRPC logic but not the high-level client logic
• Make sure things work the same wrt metrics and RPC metadata options and such
• No two SDKs are alike here unfortunately, but they are close enough

Tasks:

• Incorporate into https://github.com/temporalio/api and https://github.com/temporalio/api-go
  • Merge approach rejected - Cloud API api#378
  • Doing per-lang submodule, first step is to backport needed things: Add lang packages and update HTTP URLs cloud-api#20
• Go SDK - Cloud Operations API Client sdk-go#1459
• Java SDK - Cloud Operations API Client sdk-java#2059
• SDK Core - [Feature Request] Cloud Operations API Client sdk-core#737
• TypeScript SDK - [Feature Request] Cloud Operations API Client sdk-typescript#1416
• Python SDK - [Feature Request] Cloud Operations API Client sdk-python#522
• .NET SDK - [Feature Request] Cloud Operations API Client sdk-dotnet#244
• PHP SDK - [Feature Request] Cloud Operations API Client sdk-php#476