fix(ci): avoid fetching helm at runtime (#14669)

helm is already present in the github runner base image.

Author: olix0r

.github/workflows/integration.yml

@@ -276,8 +276,6 @@ jobs:
       - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00
         with:
           go-version-file: go.mod
-      - uses: azure/setup-helm@1a275c3b69536ee54be43f2070a358922e12c8d4
-        if: matrix.integration_test == 'helm-upgrade'
       - uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53
         with:
           pattern: image-archives-*