Add missing input validation to SuspendInstanceAsync and ResumeInstan…

[YunchuWang]

…ceAsync

Add Check.NotNullOrEmpty(instanceId) to SuspendInstanceAsync and ResumeInstanceAsync for consistency with all other instance-targeted methods (RaiseEventAsync, TerminateInstanceAsync, GetInstancesAsync, PurgeInstancesAsync, etc.) which already have this validation.

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Pull request overview

This PR adds missing input validation (Check.NotNullOrEmpty(instanceId)) to SuspendInstanceAsync and ResumeInstanceAsync in GrpcDurableTaskClient, making them consistent with other instance-targeted methods such as RaiseEventAsync, TerminateInstanceAsync, GetInstancesAsync, and PurgeInstancesAsync, which already have this validation.

Changes:

• Added Check.NotNullOrEmpty(instanceId) at the start of SuspendInstanceAsync in GrpcDurableTaskClient
• Added Check.NotNullOrEmpty(instanceId) at the start of ResumeInstanceAsync in GrpcDurableTaskClient