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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Security Group コンポーネントから始め、Basic と Advanced networking が実行中のインスタンスにセキュリティグループを適用する方法を確認します。インスタンスを停止または再起動せずに、ルールを追加、変更、削除する際の動作を定義します。サポートされる構成で、インスタンスを実行したままこれらの操作が機能すれば完了です。

索引モデルが issue の本文から書いたものです。