ci: Use fetched results for the go build task

when uploading the cache make sure it's not already fetched or to not
upload again and again

Signed-off-by: Chmouel Boudjnah <chmouel@redhat.com>

Author: chmouel

.tekton/go.yaml

@@ -122,6 +122,8 @@ spec:
                   value: ["**go.mod", "**go.sum"]
                 - name: target
                   value: oci://image-registry.openshift-image-registry.svc:5000/$(context.pipelineRun.namespace)/cache-go:{{hash}}
+                - name: fetched
+                  value: $(tasks.cached-fetch.results.fetched)
                 - name: cachePath
                   value: $(workspaces.source.path)/go-build-cache
                 - name: workingdir