Add Amazon Linux to OS testing matrix

[twz123]

Is your feature request related to a problem? Please describe.

Some konnectivity issues have been observed on AWS when using Amazon Linux. Maybe they could be reproduced using the OS testing matrix.

Describe the solution you would like

Add Amazon Linux to the matrix. This is somehow the "AWS default", so it makes sense to test k0s on it.

Describe alternatives you've considered

No response

Additional context

konnectivity pod fails to connect to kubelet:

dial tcp 172.31.43.90:10250: i/o timeout

Reachable from host, but from a pod it's just a timeout, tcpdump shows lots of checksum errors:

13:04:02.740297 IP (tos 0x0, ttl 126, id 18345, offset 0, flags [DF], proto TCP (6), length 60)
    10.244.0.4.49720 > 172.31.39.125.10250: Flags [S], cksum 0xdec2 (incorrect -> 0xe3d1), seq 2105907815, win 62727, options [mss 8961,sackOK,TS val 4153375109 ecr 0,nop,wscale 7], length 0

pod <--> pod works if pods on same node
pod <--> pod does not work if pods on different nodes
pod --> host does not work

[twz123]

This PR probably fixes the problem described:

• Don't install rules for the primary interface amazonlinux/amazon-ec2-net-utils#98