ECSTaskOperator - Change default behavior for max attempts

[SBurwash]

Good day!

I'd like to make a small modification to the EcsTaskOperator's default behavior to ensure that the task does not time out after 10 minutes.

Historically, the ECSTaskOperator would by default set its waiters' max_attemps limit to sys.maxsize. However, this was changed to a default of 10 minutes (waiter_max_attemps * waiter_delay) = 100 * 6 = 600s = 10 minutes (see PR where behavior changed).

To amend this, we:

• Changed the default value for the waiter_max_attempts for the ECSTaskOperator from 100 to sys.maxsize
• Removed legacy line which did not affect operator behavior
• Edited tests to reflect changes

Thanks to @vincbeck for the input on the changes.

[boring-cyborg]

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[hussein-awala]

There is already an open PR (#33712) to fix this issue. If you have any comment or suggestion, you can review it.

I close this one.