Delete Amazon Linux 2

[kron4eg]

What this PR does / why we need it:

Sister PR of https://github.com/kubermatic/kubeone/pull/3842

Which issue(s) this PR fixes:

Fixes #

What type of PR is this? /kind cleanup /kind api-change

Special notes for your reviewer:

Does this PR introduce a user-facing change? Then add your Release Note here:

Delete Amazon Linux 2

Documentation:

NONE