Add support for g6 and m7 family instances.

[svanhool]

Description

Some AWS Regions have G6 and M7 instances deployed. This change adds support for those.

Changes

Add G6 and M7 instances to drop down menu.

How Has This Been Tested?

My colleagues have been using the m7i instance type for their head nodes for a few months without any issues.

References

https://aws.amazon.com/ec2/instance-types/g6/
https://aws.amazon.com/ec2/instance-types/m7a/
https://aws.amazon.com/ec2/instance-types/m7i/

PR Quality Checklist

• I added tests to new or existing code
• I removed hardcoded strings and used react-i18next library (useTranslation hook and/or Trans component), see an example here
• I made sure no sensitive info gets logged at any time in the codebase (see here) (e.g. no user info or details, no stacktraces, etc.)
• I made sure that any GitHub issue solved by this PR is correctly linked
• I checked that infrastructure/update_infrastructure.sh runs without any error
• I checked that npm run build builds without any error
• I checked that clusters are listed correctly
• I checked that a new cluster can be created (config is produced and dry run passes)
• I checked that login and logout work as expected

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[dreambeyondorange]

Thank you for this PR!