[Core Feature] Finish getting user documentation into Admin

[wild-endeavor]

See #1235 for background information.

This issue is to finish up that work.

Motivation

Goal

Parse docstring in task/workflow, and register a description entity in flyteadmin.

@task 
def my_task(foo: int, bar: str) -> bool:
    """
    :param foo: Some foo description here
    :param bar: Other bar description here

    :return: Description of return type here
    ...

Description Entity Table

Name	Type
resource	string
project	string
domain	string
name	string
version	string
descriptionID	uint32
Digest	[]byte
ShortDescription	string
LongDescription	[]byte
link	string

FlyteConsole: We should be able to see the description when listing tasks/workflows

[github-actions]

Hello 👋, This issue has been inactive for over 9 months. To help maintain a clean and focused backlog, we'll be marking this issue as stale and will close the issue if we detect no activity in the next 7 days. Thank you for your contribution and understanding! 🙏

[github-actions]

Hello 👋, This issue has been inactive for over 9 months and hasn't received any updates since it was marked as stale. We'll be closing this issue for now, but if you believe this issue is still relevant, please feel free to reopen it. Thank you for your contribution and understanding! 🙏

[github-actions]

Hello 👋, this issue has been inactive for over 9 months. To help maintain a clean and focused backlog, we'll be marking this issue as stale and will engage on it to decide if it is still applicable.
Thank you for your contribution and understanding! 🙏