Blueprint for taking CI/CD oncall in SRE

Dave Smithrequested to merge
blueprint_CICD_to_SRE into master

@northrup @glopezfernandez - starting the blueprint for taking on operational support of CI/CD with SRE.

cc @erushton @tmaczukin @darbyfrey @brendan @jlenny

We'll start to break this down into issues on Epics:

Edited by Dave Smith

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