Remove docstrings indicating that there is a 24h limit on timeouts

[jerop]

Changes

Prior to this change, docstrings for timeouts indicated that they should not be higher than 24h. There is no such enforced limit, in fact we allow setting timeouts to 0 which means that there will be no timeout and the Run will execute until it completes successfully or fails from an error.

This commit makes the following changes:

• Removes the 24h limit for timeouts in docstrings
• Adds tests where timeout is set to 24h and higher

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
• Has Tests included if any functionality added or changed
• Follows the commit message standard
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• Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

NONE

/kind cleanup

[lbernick]

thanks Jerop! looks like these docstrings were introduced in #463 (for taskruns) and #2038 (for pipelinetasks) but I don't see any reason for these comments or validation of the 24h limit.

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[Yongxuanzhang]

/lgtm
Thanks for adding the tests!