🌱 Update conditions.Set function to set LastTransitionTime only when status of condition changes

[Karthik-K-N]

What this PR does / why we need it:

This PR existing behavior of Set condition function as follows

Existing behavior

1. Update condition.LastTransitionTime to current time whenever any one of the fields(Status, Reason, Severity, Message) changes in new condition.
2. Sets the condition.LastTransitionTime to newConidtion.LastTransitionTime if defined only when the newCondition does not exist.

Proposed behavior

1. Update condition.LastTransitionTime to current time only when Status field of new condition differ from existing condition status.
2. Sets the condition.LastTransitionTime to newCondition.LastTransitionTime if defined whether the newCondition already exist or new.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #11033

[Karthik-K-N]

@fabriziopandini @sbueringer Please review when you get time. Thank you.

[chrischdi]

/retitle 🌱 Update conditions.Set function to set LastTransitionTime only when status of condition changes

[chrischdi]

/area util

[sbueringer]

/assign @fabriziopandini

[k8s-ci-robot]

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[fabriziopandini]

What about adding also a test where the new condition has a last transition time time set (but it gets ignored)

[Karthik-K-N]

Added a new test in separate commit, Please let me know if anything else needs to be added. Thank you.