[go] Bump images, dependencies and versions to go 1.21.8

[m-chau]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Bump images, dependencies and versions to go 1.21.8

Also included an update on hack/update-venders.sh based on kubernetes/kubernetes#120036

Which issue(s) this PR fixes:

Part of kubernetes/release#3479
based on PR: kubernetes/kubernetes#123771

Special notes for your reviewer:

Does this PR introduce a user-facing change?

AKS LTS Kubernetes v1.24 is now built with Go 1.20.10

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[aks-lts-prow]

@m-chau: The label(s) kind/feature cannot be applied, because the repository doesn't have them.

In response to this:

What type of PR is this?

/kind feature

What this PR does / why we need it:

Bump images, dependencies and versions to go 1.20.10

Which issue(s) this PR fixes:

xref kubernetes/release#3311

based on PR: https://github.com/kubernetes/kubernetes/pull/121150/files

Special notes for your reviewer:

Does this PR introduce a user-facing change?

AKS LTS Kubernetes v1.24 is now built with Go 1.20.10

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[aks-lts-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: m-chau

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
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[haitch]

/test

[aks-lts-prow]

@haitch: The /test command needs one or more targets.
The following commands are available to trigger required jobs:

• /test pull-kubernetes-dependencies
• /test pull-kubernetes-integration
• /test pull-kubernetes-typecheck
• /test pull-kubernetes-unit
• /test pull-kubernetes-verify-govet-levee

The following commands are available to trigger optional jobs:

• /test pull-kubernetes-integration-go-compatibility
• /test pull-kubernetes-unit-go-compatibility

Use /test all to run all jobs.

In response to this:

/test

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[haitch]

/test all

[m-chau]

/test all

[m-chau]

/test pull-kubernetes-integration

[m-chau]

/retest

[m-chau]

/retest