Remove SSH access configuration from EKS node groups and related variables

[avnes]

WARNING: DO NOT MERGE UNTIL RIGHT BEFORE DEPLOYMENT. NODES ROLLOVER WILL HAPPEN!

Describe your changes

• Update pre-commit-terraform to v1.108.1
• Remove SSH access configuration from EKS node groups and related variables

Checklist before requesting a review

• I have tested changes in my sandbox
• I have added the needed changes in the test/integration folder to apply my changes in QA. Read the guide on adding environment variables in QA
• I have rebased the code to master (or merged in the latest from master)

Is it a new release?

• Apply a release tag release:(major|minor|patch), following semantic versioning in this guide or norelease if there is no changes to the Terraform code

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[wcarlsen]

Remove the ec2-keypair module, since it is most likely not used anywhere else?

[wcarlsen]

This PR falls in the same category as these:

• Fix max_pods to 110, set kubeReserved.memory using calculation scaling with max_pods and set systemReserved.memory to 200Mi #2395
• Local default overwrite of 131072 is 4 times lower than the new builtin default 524288. Let's follow the upstream defaults #2394

since they all will cause a node rollover, so maybe we should bundle them together.

[wcarlsen]

This looks fine and great catch BTW. Thanks!

[avnes]

@wcarlsen after I have looked at your PRs, and approved, I second your opinion about merging them into one.