Incorrect wording on the "Delete" tooltip

[NickOpenFn]

https://www.loom.com/share/bdf8e541b9684ce4a9f7fe80ba4cba93?sid=39d85564-2820-4509-a178-65e7792779de

Currently you can't delete the first job in the workflow (which is correct).
The delete button is disabled in this case, with correct wording.

You can delete the last jobs of an edge (which is correct).

You can't delete jobs that are in the middle of the workflow (not the first, nor the last jobs) (which is correct).
However, the tooltip when hovering on the button to delete it (which is correctly disabled) is incorrect since it's using the same wording as the tooltip when hovering on the disabled button of the first job.

Correct wording should be for any node that can't be deleted since it's in the middle of the workflow:
"This job cannot be deleted as it has downstream jobs associated with it."

[NickOpenFn]

@elias-ba Let's improve the wording for the tooltips here too:

• "This job cannot be deleted as it has downstream jobs associated with it."
• "The initial job of a workflow cannot be deleted."