Update storage/volume types from gp2 to gp3 across all plans

[markdboyd]

In order to optimize costs, we should update EBS storage from gp2 to gp3 volumes across all of our brokered plans

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Security considerations

There are no meaningful security differences from gp2 to gp3 volumes, as far as I know, just cost and performance optimizations.

https://aws.amazon.com/ebs/general-purpose/#:~:text=gp3%20offers%20SSD%2Dperformance%20at,improving%20performance%20and%20reducing%20costs.

Implementation sketch

• Update all plans in catalog to use gp3 for storage_type instead of gp2
• Update all plans in catalog to use gp3 for volumeType instead of gp2

[JasonTheMain]

ill test changing plans and start investigating the difference for a little spare fuin

[JasonTheMain]

Following issues are a blocked for now hashicorp/terraform-provider-aws#28271

[JasonTheMain]

fixed issues, pull request for changes are here

[JasonTheMain]

found bugs, will update when working

[JasonTheMain]

hashicorp/terraform-provider-aws#28160 blocked issue for now

[etiennechabert]

@JasonTheMain you should not have any more blocker to adopt gp3.

If using: https://github.com/terraform-aws-modules/terraform-aws-rds use the last version:
https://github.com/terraform-aws-modules/terraform-aws-rds/releases/tag/v5.2.2

Default values have been fixed, allowing a smooth transition to gp3.

[markdboyd]

Closing this and opening #271 to handle converting existing databases to gp3

[Ephraim-G]

closed per #330