Add TaskFail entries to Gantt chart

[bbovenzi]

If we're going to have a TaskFail table. Then let's use it. Before it was only used in the old Task Duration table, but that didn't give a user a good sense of their Task Instance. Instead, using it in the Gantt chart can tell more about how a dag run occurred.

Before. Can only see the final task instance try:

After. Can see all previous task instances failures. Notice how TryNumber = 6 and there are 6 bars in the chart:

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[jscheffl]

Really cool!

I am not sure whethere the current implementation has a small "refresh problem", tested with my firefox and a task with multiple retires. While running and waiting and taking a look while it was running looked like this:

...but my test had 5 attempts/4 fails:

..then flipping back still th same, but after hitting F5 then finally screen is updated with all attempts:

Is this a local browser caching problem? Or a small glitch/bug in refresh?
Noticed that also flipping gantt to another dag run and back does not help. I really need to hit F5 to get the right/final update.

Another glitch that I found - but this might be data related? If I "clear" a task in UI forcing a re-run, I do not see previous runs of the task in the gantt - might it be that that is not captured in task_triestable when clearing? (Alongside with the scheduling delay which is always shown for last execution only.

Bye the way as being on the Gantt view I noticed that probably the bug report in #37935 is correct - whenever using the example_bash_operatoras example DAG to test I needed to reload the gantt to get the new DAG run published after trigger. If I am starting to trigger from Grid view this is always automatic.

[eladkal]

Love it!

[bbovenzi]

Added autorefresh to fetching Task Fails.
Also added a small disclaimer in the Task Fail tooltip to remark that we only record task fails and not other kinds of retries.

I noticed that redirect bug and I'll work on that separately.

[potiuk]

Nice!