Add remote workflow execution support to pyflyte run

[CtfChan]

Tracking issue

N/A

Why are the changes needed?

Currently, the pyflyte run command supports executing remote tasks (remote-task) and remote launch plans (remote-launchplan), but lacks support for executing remote workflows directly. This creates an inconsistent user experience and limits flexibility when users want to execute workflows that are already registered in a Flyte backend.

What changes were proposed in this pull request?

This PR adds support for executing remote workflows via the pyflyte run remote-workflow command, bringing feature parity with the existing remote task and launch plan execution capabilities.

Changes include:

1. Added WORKFLOW_LAUNCHER constant to DynamicEntityLaunchCommand class
2. Updated _fetch_entity() method to handle the workflow launcher type by calling fetch_workflow() on the remote instance
3. Added support for version-specific workflow execution using the name:version syntax
4. Updated get_command() in RemoteEntityGroup to create a DynamicEntityLaunchCommand with the workflow launcher when the command is remote-workflow
5. Added comprehensive unit tests (test_remote_workflow and test_remote_workflow_with_version) to verify the functionality

How was this patch tested?

Added two new unit tests in tests/flytekit/unit/cli/pyflyte/test_run.py:

1. test_remote_workflow: Tests basic remote workflow execution with parameters
2. test_remote_workflow_with_version: Tests version-specific workflow execution using the name:version syntax

Both tests:

• Mock FlyteRemote and run_remote to verify correct behavior
• Use the CliRunner to simulate command-line execution
• Verify that fetch_workflow() is called with the correct arguments
• Ensure the workflow executes successfully with provided inputs

All tests pass successfully:

pytest tests/flytekit/unit/cli/pyflyte/test_run.py::test_remote_workflow tests/flytekit/unit/cli/pyflyte/test_run.py::test_remote_workflow_with_version -v

Setup process

N/A

Screenshots

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Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

N/A

Docs link

N/A

Summary by Bito

This pull request enhances the pyflyte run command by enabling the execution of remote workflows, introducing a WORKFLOW_LAUNCHER constant, and modifying the _fetch_entity method for workflow compatibility. It also supports version-specific workflows and includes comprehensive unit tests for reliability.

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