fix(ci): upgrade test to use stable-v2

Closes #4855

.github/actions/kamel-build-bundle/build-bundle-image.sh

@@ -110,9 +110,9 @@ export PUSH_BUNDLE_LOCAL_IMAGE=${REGISTRY_PUSH_HOST}/${IMAGE_NAMESPACE}/${BUNDLE
 export CUSTOM_IMAGE=${IMAGE_NAME}
 export CUSTOM_VERSION=${IMAGE_VERSION}
 
-export PREV_XY_CHANNEL="stable-$(make get-last-released-version | grep -Po '\d+\.\d+')"
+export PREV_XY_CHANNEL=stable-v$(make get-last-released-version | grep -Po "\d+" | head -n 1)
 echo "PREV_XY_CHANNEL=${PREV_XY_CHANNEL}" >> $GITHUB_ENV
-export NEW_XY_CHANNEL=stable-dev-$(make get-version | grep -Po "\d+\.\d+")
+export NEW_XY_CHANNEL=stable-dev-v$(make get-version | grep -Po "\d+" | head -n 1)
 echo "NEW_XY_CHANNEL=${NEW_XY_CHANNEL}" >> $GITHUB_ENV
 
 echo "BUNDLE_IMAGE_NAME=${PUSH_BUNDLE_LOCAL_IMAGE}"

script/Makefile

@@ -58,6 +58,7 @@ DEBUG_MODE ?= false
 # olm bundle vars
 MANAGER := config/manager
 MANIFESTS := config/manifests
+# will provide something like "stable-v2" (only major)
 DEFAULT_CHANNEL ?= $(shell echo "stable-v$(word 1,$(subst ., ,$(lastword $(OPERATOR_VERSION))))")
 CHANNELS ?= $(DEFAULT_CHANNEL),latest
 PACKAGE := camel-k