Add warning about 4.8.0 upgrade

[vcerenu]

Description

This PR adds a warning into the Wazuh Kubernetes upgrade.

Related Issue #7122 wazuh/wazuh-kubernetes#589

First change

Last change

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[javimed]

What if we add a step to recreate SSL ceritificates rather than warning the user about it?

I can see we currently have the following steps:

1. Checking which files are exported to the volume
2. Configuring the upgrade
3. Apply the new configuration

Maybe adding a new step with specific instructions on recreating the certificates would help. Or alternatively a step with the reference to the section on how to do this.

I don't think we should worry the user with a warning, just instruct them on how to proceed as part of the upgrade workflow.

[vcerenu]

The change was made with a warning because the only way to explain it is to refer to the code and internal configurations of Wazuh, so instead of carrying out the step explaining it seemed more correct to add a warning so that they take it into account.

I have already modified the warning and added it as an additional step to the upgrade process, clarifying that any update from a version prior of 4.8.0 to a version equal to or later than 4.8.0 requires it.

[javimed]

First lines below are duplicated. We could fix this.