Enable snapshot image creation for PUSH and TIMER [rocky]

[odyssey4me]

To ensure that the snapshot image creation happens more regularly, we ensure that the preparation for it happens for both a PUSH and a TIMER trigger.

This will ensure that the images are updated on a daily basis, not just when a new patch merges.

(cherry picked from commit e11f62aa8b2ee940619306378ddec935e58d9af8)

Issue: RE-2278

[rpc-jenkins-svc]

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