Make Volume resizing/creation timeout scale with volume size

[jonded94]

Is this a bug fix or adding new feature?

Bug fix

What is this PR about? / Why do we need it?

Hopefully solves Issue: #382

Increases volume creation/resizing timeout by introducing an additional linear factor for waiting longer on larger volumes.

This was done based on datapoints that @jon-rei gathered in this comment. I made a crude linear regression onto these datapoints:

The resulting formula for timeout would be (T timeout [s], v volume size in GiB): T(v) = 454 + 2.18 * 10^(-3)*v
So round about 7.5 min statically and for every GiB, we'd have to wait ~2ms additionally. I used 10 min statically and 5ms for every GiB to be on the safer side.

What testing is done?

None unfortunately, I don't have an easy way of testing this.

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[jonded94]

/remove-lifecycle stale

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PR needs rebase.

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