[Feature Request] Provide client from an activity

[lorensr]

Describe the solution you'd like

Provide a Temporal client to the activity context of each SDK so activity authors can more easily use the client.

• Go - Provide client from activity context sdk-go#1761
• Java - Provide client from activity context sdk-java#2362
• Core - N/A
• TypeScript - N/A: Worker only has a NativeConnection, but Activities would need either a Connection or a Client.
• Python - [Feature Request] Provide client from activity context sdk-python#721
• .NET - [Feature Request] Provide client from activity context sdk-dotnet#389
• Ruby - [Feature Request] Provide client from activity context sdk-ruby#181
• PHP - TBD whether to expose a client since one is not required to create a worker, maybe this just isn't in PHP
• Temporal CLI - N/A

[cretz]

You're linking a Go sample to justify an included-in-SDK feature. Go does not offer the client at https://pkg.go.dev/go.temporal.io/sdk/activity. I think if we want to offer activities the Temporal client for use, we should do this for every SDK instead of just an issue in TS repo.

[cretz]

Thanks!