Update rancher-monitoring to v103

This MR contains the following updates:

Package	Update	Change
rancher-monitoring (source)	major	102.0.2+up40.1.2 -> 103.0.3+up45.31.1
rancher-monitoring-crd	major	102.0.2+up40.1.2 -> 103.0.3+up45.31.1

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