[Core feature] Allow flytectl to set a targetExecutionCluster

[RRap0so]

Motivation: Why do you think this is important?

As a follow-up from https://github.com/flyteorg/flyte/issues/5081 this PR adds the ability in flytectl for the user to specify a targetExecutionCluster when creating an execution.

Goal: What should the final outcome look like, ideally?

A user can trigger an execution with flytectl in whatever cluster they want.

Describe alternatives you've considered

N/A

Propose: Link/Inline OR Additional context

No response

Are you sure this issue hasn't been raised already?

• [X] Yes

Have you read the Code of Conduct?

• [X] Yes

[runllm[bot]]

To allow flytectl to set a targetExecutionCluster, you need to add support for specifying the ExecutionClusterLabel when creating an execution. This feature enables users to direct executions to specific clusters without being tied to a Project/Domain.

Would you like more detail on how to implement this in flytectl?

Sources:

• RFC: Select cluster execution when triggering an execution
• Configuring cluster resources
• Configuring cluster resources

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