Adds deferred kwarg to Task.map to executed mapped tasks on a task server

[desertaxle]

Adds a deferred kwarg to signify that mapped tasks should be executed on a task server. deferred can be used inside or outside of flows. Calling Task.map outside of flow without deferred=True will raise an error.

Closes #13722

Example

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• If this pull request adds new functionality, it includes unit tests that cover the changes
• This pull request includes a label categorizing the change e.g. maintenance, fix, feature, enhancement, docs.

For documentation changes:

• This pull request includes redirect settings in mint.json for files that are removed or renamed.

For new functions or classes in the Python SDK:

• This pull request includes helpful docstrings.
• If a new Python file was added, this pull request contains a stub page in the Python SDK docs and an entry in docs/mint.json navigation.

[zzstoatzz]

🎉