TBR: devtools/oncall: export more data to google storage.
TBR: devtools/oncall: export more data to google storage.

This CL also moved service location types from vmon/common.go to internal/monitoring
so they can be used in oncall/collect.go.

PresubmitTest: none
Change-Id: Ifc2a5ac105076a43eadca342bf1b9f05345888f8

vanadium/go.jiri,vanadium/go.jiri