Improve output component inside collapsed components

[AdRiley]

Today:

In future output component should be:

• Marked as output
• Always the last component in the code
• Not deletable

[farmaazon]

Backlog refinement:

• The second point is already implemented.
• For now, let's treat it as "normal" node, just undeletable, and with some special icon and color.
• And do not display variable name: just an icon to connect to.
• Also, do not display output port in output node (you cannot drag edges from it anyway).

[enso-bot]

Adam Obuchowicz reports a new STANDUP for the last Monday (2024-07-15):

Progress: Implemented most of the features It should be finished by 2024-07-19.

Next Day: Next day I will be working on the same task. Finish and make PR (tests + single icon)

[enso-bot]

Adam Obuchowicz reports a new STANDUP for yesterday (2024-07-16):

Progress: Finished features, but not tests. Also fixed flaky E2E tests It should be finished by 2024-07-19.

Next Day: Next day I will be working on the same task. Finish and make PR

[enso-bot]

Adam Obuchowicz reports a new STANDUP for the last Wednesday (2024-07-17):

Progress: Added tests, and also one overlooked feature: output nodes cannot be collapsed. Created PR. It should be finished by 2024-07-19.

Next Day: Next day I will be working on the #9617 task. Start next task