Add support for RDS Aurora serverless

[drupaladmin]

Add support for Aurora serverless

[sswienton]

please add this functionality so that we can receive the same great metrics and recommendations for our serverless RDS as we do for set instance sizes - thanks!

[templarfelix]

workaround to avoid errors when waiting for this topic to be solved.
#508

[kochetovd]

Hi @templarfelix,

Thank you for your contribution and the work you’ve done — we really appreciate it!

We’ve accepted your PR and released a new version of the agent with support for AWS RDS MySQL Aurora Serverless.
Please update the agent to version 1.23.4.1 to resolve the metrics collection issues.

Also, just to clarify current behavior in Releem:

Memory Utilization is calculated relative to the maximum capacity of the Aurora Serverless instance
CPU Utilization is calculated relative to the currently allocated resources

If you have any further feedback or notice anything else — feel free to share!

[drupaladmin]

Added in the release https://github.com/Releem/mysqlconfigurer/releases/tag/1.23.0