[Release 1.28] Update Kube-router to v2.1.2

[rbrtbnfgl]

Backport for #10102 #10053

[rancher-max]

Validated on release-1.28 branch commitid 7b8f0e1b

• Used the automated test created here: Add dualstack test to validate k3s issue 10053 rancher/distros-test-framework#106

Applying  k3s_issue_10053_ns.yaml

Applying  k3s_issue_10053_pod1.yaml

Applying  k3s_issue_10053_pod2.yaml

Command:
kubectl exec -n test-k3s-issue-10053 pod/client --kubeconfig=/tmp/maxk3slocal_kubeconfig -- wget -O - http://10.42.1.8
---------------------
Assertion:
Hostname: server
----------------------
Matched with result:
Hostname: server
IP: 127.0.0.1
IP: ::1
IP: 10.42.1.8
IP: 2001:cafe:42:1::8
IP: fe80::44f8:f1ff:fe60:6cef
RemoteAddr: 10.42.1.9:49464
GET / HTTP/1.1
Host: 10.42.1.8
User-Agent: Wget
Accept: */*
Connection: close

Applying  k3s_issue_10053_netpol.yaml

Command:
kubectl exec -n test-k3s-issue-10053 pod/client --kubeconfig=/tmp/maxk3slocal_kubeconfig -- wget -O - http://10.42.1.8
---------------------
Assertion:
Hostname: server
----------------------
Matched with result:
Hostname: server
IP: 127.0.0.1
IP: ::1
IP: 10.42.1.8
IP: 2001:cafe:42:1::8
IP: fe80::44f8:f1ff:fe60:6cef
RemoteAddr: 10.42.1.9:49474
GET / HTTP/1.1
Host: 10.42.1.8
User-Agent: Wget
Accept: */*
Connection: close

Removing k3s_issue_10053_pod1.yaml

Applying  k3s_issue_10053_pod1.yaml

Command:
kubectl exec -n test-k3s-issue-10053 pod/client --kubeconfig=/tmp/maxk3slocal_kubeconfig -- wget -O - http://10.42.1.10
---------------------
Assertion:
Hostname: server
----------------------
Matched with result:
Hostname: server
IP: 127.0.0.1
IP: ::1
IP: 10.42.1.10
IP: 2001:cafe:42:1::a
IP: fe80::ecab:7cff:fe7c:3489
RemoteAddr: 10.42.1.9:46312
GET / HTTP/1.1
Host: 10.42.1.10
User-Agent: Wget
Accept: */*
Connection: close

Removing k3s_issue_10053_ns.yaml

PASSED! Test: [k3s/10053] Validates Ingress after Pod Restart when Network Policies are present
•

Ran 8 of 8 Specs in 468.803 seconds
SUCCESS! -- 8 Passed | 0 Failed | 0 Pending | 0 Skipped
--- PASS: TestDualStackSuite (468.81s)
PASS
ok  	github.com/rancher/distros-test-framework/entrypoint/dualstack	470.044s