remove deprecated field that breaks upgrade nodegroup timeout value

[aclevername]

Description

Closes #4787

before (print added for debugging):

2022-02-22 11:22:40 [ℹ]  eksctl version 0.86.0-dev+551fd9a4.2022-02-22T11:21:57Z
2022-02-22 11:22:40 [ℹ]  using region us-west-2
2022-02-22 11:22:41 [ℹ]  25m0s

after

2022-02-22 11:25:48 [ℹ]  eksctl version 0.86.0-dev+b7418e27.2022-02-22T11:25:02Z
2022-02-22 11:25:48 [ℹ]  using region us-west-2
2022-02-22 11:25:49 [ℹ]  45m0s

[cPu1]

Well spotted! We should also check if there are any commands relying on this behaviour.

[aclevername]

Well spotted! We should also check if there are any commands relying on this behaviour.

good point. I think this flag was causing ALL of the commands to have this default timeout value, but only some commands had the AddTimeoutFlag call done after the AddCommonAWS which is what made it work. I've changed it so that a new Cmd has this set by default, so those who configure the timeout flag will still override it, but it should preserve the previous behaviour of 25m being default