Merge pull request e2e-win#232 from ionutbalutoiu/manual-prowjob-trig…

…ger-doc

Manual Prowjob trigger documentation

prow/docs/ManualProwjobTrigger.md

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+# Manual Prowjob Trigger
+
+In order to manually trigger a Prowjob, we need:
+
+* [golang](https://go.dev/doc/install) tool installed.
+* [kubectl](https://kubernetes.io/docs/tasks/tools) tool installed.
+* `KUBECONFIG` environment variable set, for the Kubernetes cluster where the Prow system is running.
+
+After golang is installed make sure that `$GOPATH/bin` is in your `$PATH` environment variable (more info about `$GOPATH`
+[here](https://pkg.go.dev/cmd/go#hdr-GOPATH_environment_variable)).
+
+Once golang is configured, we need to install the following tools:
+
+```bash
+go install k8s.io/test-infra/prow/cmd/mkpj@latest
+go install github.com/mikefarah/yq/[email protected]
+```
+
+With the required tools installed, change directory to the [k8s-e2e-runner](../../) local cloned repo, and run the following to trigger a particular Prowjob:
+
+```bash
+JOB_NAME="aks-e2e-ltsc2022-azurecni-1.27"
+
+mkpj --job=${JOB_NAME} \
+    --job-config-path=./prow/jobs/sig-windows-networking.yaml \
+    --config-path=./prow/config.yaml | \
+        yq '.metadata.namespace = "prow"' | kubectl apply -f -
+```
+
+NOTE: The above code snippet assumes that Prow system watches `Prowjob` resources from the `prow` Kubernetes namespace.
+
+In order to check the available Prowjobs, check the [sig-windows-networking.yaml](../../prow/jobs/sig-windows-networking.yaml) file.