#362 Feat: Make pod start time available als logging link template variable in kubeflow plugin Pull request opened by fg91 TL;DR I'd like to add the filter

timestamp >= podStartTime

to our stackdriver log link template. This is important because currently our users have to manually extend the time range (default 1h) each time they visit the stackdriver log page. (Unless the job started and finished within the past hour.) To this aim, I recently made the pod start and finish time available as logging link template variables in RFC3339 time format which is required by google cloud logging (#360). Currently, the kubeflow plugin doesn't pass the pod start time to the log plugin though. In this PR I extend the kubeflow plugin to do so. Type ☐ Bug Fix ☑︎ Feature ☐ Plugin Are all requirements met? ☑︎ Code completed ☑︎ Smoke tested ☑︎ Unit tests added ☐ Code documentation added ☑︎ Any pending items have an associated Issue Complete description NA Tracking Issue NA Follow-up issue NA flyteorg/flyteplugins ✅ All checks have passed 7/7 successful checks