Management Server does not recognize a session as removed in some scenarios

### Problem Description

In some scenarios, the Management Server does not recognize that a console session has been released. As a consequence of that, the `removed` column of the `cloud.console_session` table remains indefinitely marked as `NULL`.

### Versions

ACS versions 4.19 and 4.20

### The steps to reproduce the bug

- https://github.com/apache/cloudstack/pull/11016#pullrequestreview-2993780512 and https://github.com/apache/cloudstack/pull/11016#issuecomment-3052399701 describe two different situations in which this bug occur.

### What to do about it?

Normalize these scenarios, ensuring that the `removed` attribute of console sessions is corretly set to the datetime in which the sessions are released.

Comienza leyendo los dos escenarios descritos en la revisión y el comentario de pull request #11016; después, rastrea cómo el Management Server registra los eventos de liberación de console-session. Verifica el comportamiento con la tabla cloud.console_session y considera el trabajo completo cuando cada escenario informado establezca removed en la fecha y hora de liberación en lugar de dejarlo en NULL.

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