Update go from 1.20.7 to 1.21.1

[minikube-bot]

Kubernetes Project just updated the golang version, updating minikube golang to match Kubernetes.

This PR was auto-generated by make update-golang-version using update-golang-version.yml CI Workflow.

[k8s-ci-robot]

Hi @minikube-bot. Thanks for your PR.

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[minikube-pr-bot]

kvm2 driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 17221) |
+----------------+----------+---------------------+
| minikube start | 51.6s    | 49.2s               |
| enable ingress | 27.9s    | 27.5s               |
+----------------+----------+---------------------+

Times for minikube start: 50.0s 53.1s 52.4s 52.2s 50.2s
Times for minikube (PR 17221) start: 51.0s 46.7s 50.0s 49.2s 49.3s

Times for minikube ingress: 28.2s 27.6s 28.2s 28.2s 27.1s
Times for minikube (PR 17221) ingress: 27.6s 27.2s 27.6s 28.1s 27.1s

docker driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 17221) |
+----------------+----------+---------------------+
| minikube start | 24.7s    | 23.8s               |
| enable ingress | 21.2s    | 21.1s               |
+----------------+----------+---------------------+

Times for minikube start: 25.6s 24.1s 25.5s 26.2s 21.9s
Times for minikube (PR 17221) start: 25.6s 25.0s 22.9s 22.5s 23.1s

Times for minikube ingress: 20.9s 22.3s 20.4s 20.4s 21.9s
Times for minikube (PR 17221) ingress: 20.9s 21.9s 20.8s 20.8s 20.9s

docker driver with containerd runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 17221) |
+----------------+----------+---------------------+
| minikube start | 22.7s    | 23.0s               |
| enable ingress | 31.7s    | 31.2s               |
+----------------+----------+---------------------+

Times for minikube start: 24.2s 20.5s 21.3s 23.6s 23.8s
Times for minikube (PR 17221) start: 23.5s 23.0s 24.3s 20.8s 23.3s

Times for minikube ingress: 32.3s 31.4s 32.4s 32.3s 30.3s
Times for minikube (PR 17221) ingress: 31.4s 31.4s 30.4s 31.4s 31.4s

[minikube-pr-bot]

These are the flake rates of all failed tests.

Environment	Failed Tests	Flake Rate (%)
Hyperkit_macOS	TestErrorSpam/setup (gopogh)	0.00 (chart)
KVM_Linux_crio	TestStartStop/group/default-k8s-diff-port/serial/SecondStart (gopogh)	0.60 (chart)
QEMU_macOS	TestFunctional/parallel/ImageCommands/ImageListShort (gopogh)	8.75 (chart)
Hyperkit_macOS	TestForceSystemdEnv (gopogh)	10.49 (chart)
Hyperkit_macOS	TestMinikubeProfile (gopogh)	16.05 (chart)

To see the flake rates of all tests by environment, click here.