Improvement Request : Adjust security groups more flexibly

##### ISSUE TYPE
* Improvement Request

##### COMPONENT NAME
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Security Group
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##### CLOUDSTACK VERSION
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4.19.1.2
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##### CONFIGURATION
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Basic or Advanced networking with Security Group
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##### OS / ENVIRONMENT

##### SUMMARY
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We should be able to add, change or delete security group rules while the instance is running.
Sometimes we need to change the security group for some testing or security protection purposes. However, currently, we are unable to switch to another security group rules while the instance is running. As a result, we have no choice but to affect more instance or stop the instance , change the security group, and then start the instance again.
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##### STEPS TO REPRODUCE

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##### EXPECTED RESULTS

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We should be able to add, change or delete security group rules while the instance is running.
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Inizia con il componente Security Group e verifica in che modo Basic e Advanced networking applicano i gruppi di sicurezza alle istanze in esecuzione. Definisci il comportamento per l’aggiunta, la modifica e l’eliminazione delle regole senza arrestare o riavviare un’istanza. Il lavoro è completato quando queste operazioni funzionano mentre l’istanza rimane in esecuzione nelle configurazioni supportate.

Scritto dal modello di indicizzazione a partire dal testo della issue.