Backend support for runStarlarkScript in the EMUI

[Dartoxian]

Background & motivation

@mieubrisse has suggested an experimental project for defining enclaves via a GUI. Services will be visually represented as a graph. It will be possible to convert the graph to a starlark script within the EMUI, which ideally should be able to execute the script in the same way it can execute packages.

Currently the EMUI connecting via the connect-es api can only execute published starlark packages via runStarlarkPackage.

Desired behaviour

In order to execute the starlark script the EMUI needs to be able to call an endpoint like runStarlarkScript. I think adding this to the enclave-manger api would be the quickest way to unlock this behaviour in the EMUI.

The REST api seems to support this on the /enclaves/{enclave_identifier}/starlark/scripts endpoint. Should this endpoint be used? (how? do we pickup #1950?)

How important is this to you?

Nice to have; this feature would make using Kurtosis more enjoyable.

What area of the product does this pertain to?

Frontend: the Graphical User Interface, including the Enclave Manager

[mieubrisse]

Done in #2103