Use pipeline service account

it has 'edit' role so it can do everything the importimager can.

The sa is created by RH OpenShift Pipeline Operator.

Author: jpopelka

values/import-images/fedora-source-git-prod.yaml

@@ -4,6 +4,6 @@ image:
 host: https://api.auto-prod.gi0n.p1.openshiftapps.com:6443
 
 secret:
-  name: importimager-token-8wlrc
+  name: pipeline-token-m8z9n
 
 service: fedora-source-git

values/import-images/packit-prod.yaml

@@ -4,6 +4,6 @@ image:
 host: https://api.auto-prod.gi0n.p1.openshiftapps.com:6443
 
 secret:
-  name: importimager-token-gjfb6
+  name: pipeline-token-6mc7z
 
 service: packit

values/import-images/stream-prod.yaml

@@ -4,6 +4,6 @@ image:
 host: https://api.auto-prod.gi0n.p1.openshiftapps.com:6443
 
 secret:
-  name: importimager-token-lwwsk
+  name: pipeline-token-dw46p
 
 service: stream