Add trigger rule tooltip

[adamfrly]

closes: #21201
related: #19939

This adds the Trigger Rule to the tooltip of operators in the graph view. It provides more detail about the relationships between up and downstream tasks in a DAG.

---

^ Add meaningful description above

Read the Pull Request Guidelines for more information.
In case of fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
In case of a new dependency, check compliance with the ASF 3rd Party License Policy.
In case of backwards incompatible changes please leave a note in a newsfragment file, named {pr_number}.significant.rst or {issue_number}.significant.rst, in newsfragments.

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache Airflow community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/airflow/blob/main/CONTRIBUTING.rst)
Here are some useful points:

• Pay attention to the quality of your code (flake8, mypy and type annotations). Our pre-commits will help you with that.
• In case of a new feature add useful documentation (in docstrings or in docs/ directory). Adding a new operator? Check this short guide Consider adding an example DAG that shows how users should use it.
• Consider using Breeze environment for testing locally, it's a heavy docker but it ships with a working Airflow and a lot of integrations.
• Be patient and persistent. It might take some time to get a review or get the final approval from Committers.
• Please follow ASF Code of Conduct for all communication including (but not limited to) comments on Pull Requests, Mailing list and Slack.
• Be sure to read the Airflow Coding style.
  Apache Airflow is a community-driven project and together we are making it better 🚀.
  In case of doubts contact the developers at:
  Mailing List: dev@airflow.apache.org
  Slack: https://s.apache.org/airflow-slack

[bbovenzi]

There are a few linting issues. I'd run yarn && yarn lint in the /airflow/www directory. Otherwise, looking good.

[bbovenzi]

Let's double check everywhere we call tiTooltip. I think we'll get an error in at least gantt.js, maybe other spots.

Also, care to include a screenshot of the updated tooltip so other reviewers can see what the UI change is?

[adamfrly]

Attached is a screenshot of the change to the Graph view tooltip. Note that "Trigger Rule" has been added just below the Operator indicator.

[adamfrly]

Let's double check everywhere we call tiTooltip. I think we'll get an error in at least gantt.js, maybe other spots.

Also, care to include a screenshot of the updated tooltip so other reviewers can see what the UI change is?

tiTooltip is used in gantt.js, graph.js, and dags.js. In gantt.js null was passed as the second argument to tiTooltip so that arguments are now passed properly. In the other two files however, the extra task argument doesn't look like it will cause any problems

[bbovenzi]

Nice work! Thanks for putting up with all my comments.

[adamfrly]

This was my first ever open source contribution so I really appreciated the comments. Thanks for making the process enjoyable!

[boring-cyborg]

Awesome work, congrats on your first merged pull request!