Update Terraform Syntax and Ruby Function Version

[FinnIckler]

This PR:

• Updates the Terraform Syntax to work with Version 14 (no more deprecation warnings come up when I run terraform plan)
• Updates the Lambda Function Version to 3.2 because 2.7 is EOL.
• Changes the Read Capacity from DynamoDB from 20 to 5 because 20 is waaaaaay too much and costs us like 20 bucks a year unnecessarily. This should better yet just be a on demand DynamoDB Table

[FinnIckler]

This should fix #10 and https://github.com/thewca/worldcubeassociation.org/issues/8235

[FinnIckler]

@lgarron are you reviewing this or should I get someone else?

[lgarron]

@lgarron are you reviewing this or should I get someone else?

Is there anyone more qualified to review? I don't know Terraform, but I don't see any obvious issues with the changes.

(Also, all this configuration makes me miss Google App Engine. Or at least some sort of edge workers.)