Ensure errors don't cause silent failure, make authN failure messages friendlier

[jeri-temporal]

What was changed

• Moved CommandHarnes from integration-only commands_test.go to common_test.go so it could be used for unit tests as well
• Ensure failures are printed to stderr when error logging is disabled. This prevents the cloud CLI from failing silently
• Introduce the FriendlyError type as a means of marking error messages for direct display without appending the full error chain
• Use a custom interceptor to capture errors from within the gRPC call chain and wrap them around errors stored on the context struct. This allows errors.Is/errors.As to find FriendlyErrors that occur inside gRPC callback methods

Why?

Running commands while not logged in (including temporal cloud whoami) produces no output and a non-zero exit code, and other errors are similarly swallowed unless handled specifically within each command.

Checklist

1. Closes CLDDX-141

2. How was this tested:
   make, make test, make test-integration, verified that running commands like temporal cloud whoami or temporal cloud namespace list without being authenticated prints no login session found, please run `temporal cloud login`

3. Any docs updates needed?
   No