Fix the xml report generation for kind e2e jobs

The generation of the junitxml test results file fails because mktemp
accepts a slighlty different syntax on alpine. Pull in a fix to that
from the plumbing repo.

The ARTIFACTS varible is usually set by prow for prow jobs configs.
Set it to the mount point of the workspace used by the e2e kind
test task.

Signed-off-by: Andrea Frittoli <andrea.frittoli@uk.ibm.com>

Author: afrittoli

go.mod

@@ -23,7 +23,7 @@ require (
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/opencontainers/image-spec v1.0.3-0.20220114050600-8b9d41f48198
 	github.com/pkg/errors v0.9.1
-	github.com/tektoncd/plumbing v0.0.0-20211012143332-c7cc43d9bc0c
+	github.com/tektoncd/plumbing v0.0.0-20220329085922-d765a5cba75f
 	go.opencensus.io v0.23.0
 	go.uber.org/zap v1.19.1
 	golang.org/x/oauth2 v0.0.0-20220223155221-ee480838109b

go.sum

@@ -2,3 +2,4 @@ SKIP_INITIALIZE=true
 PIPELINE_FEATURE_GATE=stable
 RUN_YAML_TESTS=false
 KO_DOCKER_REPO=registry.local:5000
+ARTIFACTS=/workspace/source/artifacts

test/e2e-tests-kind.env

@@ -58,8 +58,8 @@ function run_e2e() {
   # Run these _after_ the integration tests b/c they don't quite work all the way
   # and they cause a lot of noise in the logs, making it harder to debug integration
   # test failures.
-  if [ "${RUN_YAML_TESTS}" == "true"]; then
-    go_test_e2e -tags=examples -timeout=20m ./test/ || failed=1
+  if [ "${RUN_YAML_TESTS}" == "true" ]; then
+    go_test_e2e -mod=readonly -tags=examples -timeout=20m ./test/ || failed=1
   fi
 }