support for t3a and gp3

[kawnayeen]

would be nice to have support for t3a instance series and gp3 storages as they are of lower cost and better performance

[axelfontaine]

t3a support will require a bit more work to ensure things work correctly with AMD processors in addition to Intel.

However gp3 volumes should be an easy thing to do. I'll keep you posted on progress.