Add support for InitialCooldownPeriod

[shayrybak]

Proposal

Add support for the scaled object generated by the HTTPScaledObject to have it's initialCooldownPeriod defined.

Add the field InitialCooldownPeriod to the httpScaledObject spec.

The generated ScaledObject should have the same value.

Opened a PR to add this functionality.

Use-Case

In our use case we use the HTTP addon to deploy sandbox environments for developers. and we use the http scaler to scaled them to 0 when no requets are happening for some time to reduce costs. however without this option, the users have to first make some requests for the sandbox to be available after the deployment.
with this feature the replicas can be up for some time right after the deployment.

Is this a feature you are interested in implementing yourself?

Yes

Anything else?

No response