[Feature - UI] Support launching single tasks

[EngHabu]

Motivation: Why do you think this is important?
Single tasks are becoming first-class citizens. Just like how people can launch workflows, they should be able to launch tasks using the single tasks launch API.

Flyte component

• Overall
• Flyte Setup and Installation scripts
• Flyte Documentation
• Flyte communication (slack/email etc)
• FlytePropeller
• FlyteIDL (Flyte specification language)
• Flytekit (Python SDK)
• FlyteAdmin (Control Plane service)
• FlytePlugins
• DataCatalog
• FlyteStdlib (common libraries)
• FlyteConsole (UI)
• Other

Additional context
Assumption: we will be able to use most of the UI components already developed for the launch form. If this is not the case, we should re-evaluate the priority of this work.

[schottra]

@EngHabu Do we have endpoints for launching a single task yet? If not, is there an issue tracking that work?

[EngHabu]

Yes, @katrogan can provide information about this.

[katrogan]

@schottra yep it's completed end to end and docs are here: https://github.com/lyft/flyte/blob/master/rsts/user/features/single_task_execution.rst

for the UI to trigger a single task execution you'll want to reference a task rather than a launch plan in the create execution request spec. (we haven't rolled out renaming the field)

[schottra]

Implemented by flyteorg/flyteconsole#103
Available in flyteconsole v0.13.0