Fix: Build the krew based on -krew in the release name

This is expected to allow release of the supportpkg krew plugin independent of the  debug container image

Author: mrajagopal

.github/workflows/release-builder.yml

@@ -12,6 +12,7 @@ env:
 
 jobs:
   build:
+    if: endsWith(github.event.release.tag_name, '-krew')
     permissions:
       contents: write