[UI Feature] Provide a service account or iam role at execution time.

[katrogan]

Motivation: Why do you think this is important?
A user should be able to interact with all available options on the Workflow Launch Form. For example, override the kubernetes_service_account or assumable_iam_role used at execution time in the UI. This is currently possible in flytectl and flyte-cli, and furthermore UI support presently exists for single task executions.

These options should be included into a new component that renders inside the Launch Form. The component will be a toggle called "Advanced Options".

see: https://docs.flyte.org/projects/flytectl/en/stable/gen/flytectl_create_execution.html

Goal: What should the final outcome look like, ideally?
A clear and concise description of what you want to happen or achieve.

[Optional] Propose: Link/Inline OR Additional context AND/OR Mock ideas
If you have ideas about the implementation please propose the change. If inline keep it short, if larger then you link to an external document.

[kumare3]

@katrogan / @jsonporter We should allow modifications of various other fields from the launch form - as supported by - https://docs.flyte.org/projects/flyteidl/en/stable/protos/docs/admin/admin.html#executionspec