[v1.13] envoy: Bump golang version to 1.21.8

[sayboras]

This is to pick up the new image with updated golang version, and other dependency bump.

Related commit: cilium/proxy@bbde409
Related build: https://github.com/cilium/proxy/actions/runs/8179371187/job/22365308893

[sayboras]

/test-backport-1.13

Job 'Cilium-PR-K8s-1.22-kernel-4.19' failed:

Click to show.

Test Name

K8sDatapathConfig Etcd Check connectivity

Failure Output

FAIL: Pods are not ready in time: timed out waiting for pods with filter  to be ready: 4m0s timeout expired

Jenkins URL: https://jenkins.cilium.io/job/Cilium-PR-K8s-1.22-kernel-4.19/464/

If it is a flake and a GitHub issue doesn't already exist to track it, comment /mlh new-flake Cilium-PR-K8s-1.22-kernel-4.19 so I can create one.

Then please upload the Jenkins artifacts to that issue.

Job 'Cilium-PR-K8s-1.21-kernel-4.19' hit: #30802 (92.21% similarity)

Job 'Cilium-PR-K8s-1.21-kernel-4.19' failed:

Click to show.

Test Name

K8sDatapathServicesTest Checks E/W loadbalancing (ClusterIP, NodePort from inside cluster, etc) with L7 policy Tests NodePort with L7 Policy

Failure Output

FAIL: Request from testclient-ssxsr pod to service http://192.168.56.11:30921 failed

Jenkins URL: https://jenkins.cilium.io/job/Cilium-PR-K8s-1.21-kernel-4.19/418/

If it is a flake and a GitHub issue doesn't already exist to track it, comment /mlh new-flake Cilium-PR-K8s-1.21-kernel-4.19 so I can create one.

Then please upload the Jenkins artifacts to that issue.

Job 'Cilium-PR-K8s-1.21-kernel-4.19' hit: #30802 (90.94% similarity)

[sayboras]

/test-1.25-4.19

[jrajahalme]

/test-1.21-4.19

[jrajahalme]

/test-1.22-4.19

[jrajahalme]

/test-1.21-4.19

[sayboras]

Test summary:

• test-1.21-4.19 hit CI: K8sDatapathConfig MonitorAggregation Checks that monitor aggregation restricts notifications #30802
• test-1.25-4.19 provision failed consistently as per below link, however it's not required check
  • https://jenkins.cilium.io/job/Cilium-PR-K8s-1.25-kernel-4.19/

Required reviews are in, so marking this ready to merge.

[joestringer]

/test-1.21-4.19

[joestringer]

Hmm, @sayboras do you think that test is just broken on v1.13? I wonder if that regressed at some point (doesn't seem likely related to this PR, but could potentially affect all v1.13 backports 🤔 )

[sayboras]

do you think that test is just broken on v1.13? I wonder if that regressed at some point (doesn't seem likely related to this PR, but could potentially affect all v1.13 backports 🤔 )

Ah I think it's not consistently broken, but more about a flake. As the previous run was failed for another test case.

https://jenkins.cilium.io/job/Cilium-PR-K8s-1.21-kernel-4.19/418/