[helm chart] Remove prometheus chart dependency from Fission (#2371)

* Removing Prometheus dependency from fission chart
* User should install their own Prometheus installation
* Install Prometheus chart in Github CI workflow
* Change Prometheus query logging to debug

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

.github/workflows/push_pr.yaml

@@ -74,9 +74,6 @@ jobs:
         run: |
           helm lint charts/fission-all/
 
-      - name: Helm update
-        run: helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
-
       - name: Install Skaffold
         run: |
           curl -Lo skaffold https://storage.googleapis.com/skaffold/releases/latest/skaffold-linux-amd64
@@ -88,6 +85,13 @@ jobs:
         with:
           install-only: true
 
+      - name: Setup Prometheus Stack
+        run: |
+          helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
+          helm repo update
+          kubectl create ns monitoring
+          helm install monitoring prometheus-community/prometheus -n monitoring
+
       - name: Build and Install Fission
         run: |
           kubectl create ns fission