Improve e2e tests

[kravciak]

• pass chart versions from makefile to helm_in and helm_up commands
• simplify audit scanner installation test
• properly cleanup leftovers from audit scanner test
• add curlpod function that calls curl from in pod
• remove retries where it's not needed
• reorganize opentelemetry code to not call single operation per test
• use --reuse parameter for helm upgrade

If you want to run locally before rc2 you need to use auditScanner.image.tag=latest parameter and symlink charts directory into e2e tests.

KUBEWARDEN_CHARTS_LOCATION=./charts make clean cluster install tests audit-scanner-installation.bats

diff --git a/Makefile b/Makefile
index 734ef27..8a1ee33 100644
--- a/Makefile
+++ b/Makefile
@@ -71,7 +71,7 @@ define install-kubewarden =
                $(KUBEWARDEN_CRDS_CHART_RELEASE) $(KUBEWARDEN_CHARTS_LOCATION)/kubewarden-crds
        $(helm_in) --version $(KUBEWARDEN_CONTROLLER_CHART_VERSION) \
                --values $(ROOT_RESOURCES_DIR)/default-kubewarden-controller-values.yaml \
-               $(KUBEWARDEN_CONTROLLER_CHART_RELEASE) $(KUBEWARDEN_CHARTS_LOCATION)/kubewarden-controller
+               $(KUBEWARDEN_CONTROLLER_CHART_RELEASE) $(KUBEWARDEN_CHARTS_LOCATION)/kubewarden-controller --set auditScanner.image.tag=latest
        $(helm_in) --version $(KUBEWARDEN_DEFAULTS_CHART_VERSION) \
                --values $(ROOT_RESOURCES_DIR)/default-kubewarden-defaults-values.yaml \
                $(KUBEWARDEN_DEFAULTS_CHART_RELEASE) $(KUBEWARDEN_CHARTS_LOCATION)/kubewarden-defaults
diff --git a/tests/common.bash b/tests/common.bash
index 827dc5a..f824913 100644
--- a/tests/common.bash
+++ b/tests/common.bash
@@ -22,6 +22,7 @@ function helm_up {
     # set default version, can be overridden with parameters
     case $1 in
         'kubewarden-controller')
+            extraparams='--set auditScanner.image.tag=latest'
             def_version=$KUBEWARDEN_CRDS_CHART_VERSION;;
         'kubewarden-defaults')
             def_version=$KUBEWARDEN_DEFAULTS_CHART_VERSION;;
@@ -31,7 +32,7 @@ function helm_up {

     helm upgrade --version $def_version --wait \
         --namespace $NAMESPACE --create-namespace \
-        "${@:2}" $1 $KUBEWARDEN_CHARTS_LOCATION/$1
+        "${@:2}" $1 $KUBEWARDEN_CHARTS_LOCATION/$1 ${extraparams:-}