rename testing github workflows

* workflows using e2e test have 'e2e-' as a filename prefix
* workflows triggering on PRs or schedule use a '-ci' filename suffix
* workflow titles for E2E are prefixed with 'E2E'

.github/workflows/fleet-upgrade.yml → .github/workflows/e2e-fleet-upgrade-ci.yml

@@ -1,5 +1,5 @@
-# Upgrade from latest released fleet to dev version
-name: Upgrade Fleet Standalone to HEAD
+# Upgrade Fleet standalone from latest released to dev version
+name: E2E Upgrade Fleet Standalone to HEAD
 
 on:
   schedule:

.github/workflows/rancher-integration.yml → .github/workflows/e2e-rancher-upgrade-fleet-to-head-ci.yml

@@ -1,5 +1,5 @@
 # Upgrade fleet in latest Rancher to dev version and run MC tests
-name: Upgrade Fleet in Rancher To HEAD
+name: E2E Upgrade Fleet in Rancher To HEAD
 
 on:
   schedule: